Optical glass
We claim: 1. Thorium-free optical glass having a refractive index of 1.71 to 1.85 and Abbe number of 40 to 57 containing oxygen ions and fluorine ions as anions, in which cations in the glass calculat... Read More
Inventors: Ishibashi, Kazufumi; Matsumaru, Shizuo; Ichimura, Takeo;, Assignee: Nippon Kogaku K.K. (Tokyo, JP) |
Lens barrel capable of automatic and manual focalizing operations
In accordance with the invention, there is provided a lens barrel including a drive force transferring rotary member for transferring a focalizing operational force from a camera body, a rotary cylind... Read More
Inventors: Tomori, Yasumasa;, Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha (Tokyo, JP) |
Optical system for night-vision glasses
I claim: 1. An optical system for night-vision glasses having a long focal length and a large image angle comprising objective lens means having a structural length less than 1.6 f and an aperture rat... Read More
Inventors: Schlegel, Franz;, Assignee: Optische Werke G. Rodenstock (Munich, DE) |
Method and apparatus for creating the illusion of moving images
What is claimed is: 1. An apparatus for generating an animated image when viewed from a location in motion, said apparatus comprising: (a) a series of images; (b) an illumination device for the emissi... Read More
Inventors: Brachet, Roland; Boismard, Pierre;, Assignee: |
Liquid crystal display device having a material for disturbing the orientation of the liquid crystal molecules
The object of the present invention is to solve the problems of the prior art. Therefore, to accomplish this object, in a liquid crystal display device produced by disposing a pair of transparent elec... Read More
Inventors: Nakamura, Kimiaki; Yoshida, Hidefumi; Hanaoka, Kazutaka;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Method of producing a microcrystal semiconductor thin film
A first object of the present invention is to solve the aforementioned problems, thus providing a photovoltaic element that can be produced at a low cost suitable for practical use, that demonstrates ... Read More
Inventors: Matsuyama, Jinsho;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Process for the preparation of copolymers
OF THE INVENTION Nickel and cobalt are examples of suitable Group VIII metals for use in the process according to this invention. The Group VIII metal is preferably a noble Group VIII metal, of which... Read More
Inventors: Baardman, Frank; Jubb, Jayne;, Assignee: Shell Oil Company (Houston, TX) |
Polyheterocyclic polymers derived from substituted tetraamino pyridines
I claim: 1. Polymers consisting essentially of recurring units of the following structural formula: ##STR48## wherein R.sub.1 represents a monovalent member selected from the group consisting of alkyl... Read More
Inventors: Gerber, Arthur H.;, Assignee: Horizons Research Incorporated (Cleveland, OH) |
Thermally stable aromatic enyne polyimides
We claim: 1. An aromatic enyne polyimide consisting essentially of recurring units having the following structural formula: ##STR12## wherein Ar is a divalent aromatic radical; R is sulfur, sulfonyl, ... Read More
Inventors: Reinhardt, Bruce A.; Arnold, Fred E.;, Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC) |
Novel end-capped polyimide oligomers
OF THE INVENTION The end-capped polyimide oligomers can be prepared by two alternate synthesis methods subsequently designated as Synthesis Method A and Synthesis Method B. Synthesis Method A In the ... Read More
Inventors: Antonoplos, Patricia A.; Heilman, William J.;, Assignee: Gulf Oil Corporation (Pittsburgh, PA) |
Novel partially acetylene end-capped polyimide oligomers
OF THE INVENTION The partial acetylene end-capped polyimide oligomers can be prepared by two alternate synthesis methods subsequently designated as Synthesis Method A and Synthesis Method B. Synthesi... Read More
Inventors: Antonoplos, Patricia A.; Heilman, William J.;, Assignee: Gulf Oil Corporation (Pittsburgh, PA) |
Solar cell array panel and method of manufacture
OF THE INVENTION The transparent polyimide protective coating has been described hereinabove. The polyimide containing isoimide groups used as the matrix for the support member of the solar panel dis... Read More
Inventors: Fraser, Allister F.; Alsbach, Walter G.;, Assignee: Hughes Aircraft Company (El Segundo, CA); International Telecommunications Satellite Organization (Washington, DC) |
Polyimide compositions
OF THE INVENTION The preparation of polyamic precursors of polyimide is carried out by condensation polymerization of the dianhydrides and diamines in an aprotic solvent medium. Suitable aprotic solv... Read More
Inventors: Fryd, Michael;, Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Method for the preparation of polyimide and polyisoindoloquinazoline dione precursors
OF THE INVENTION In the context of the present patent application, "tetracarboxylic acid dianhydride" means compounds which comprise at least two acid anhydride groups. The term "diamino compound" al... Read More
Inventors: Ahne, Hellmut; Kuhn, Eberhard;, Assignee: Siemens Aktiengesellschaft (Berlin and Munich, DE) |
Method for making polyimide oligomers
We claim: 1. A method of making polyimide oligomers, comprising the steps of: (a) dissolving a diamine in a suitable solvent; (b) chilling the diamine solution; (c) mixing together an unsaturated mono... Read More
Inventors: Lubowitz, Hyman R.; Sheppard, Clyde H.;, Assignee: The Boeing Company (Seattle, WA) |
Method of preparing modified polyimides or poly(amide-tmides)
What is claimed is: 1. A method of modifying the properties of a polymeric material selected from the group consisting of polyimides, poly(amide-imides), and polyimides and poly(amide-imides) containi... Read More
Inventors: Biensan, Michel;, Assignee: M&T Chemicals Inc. (Woodbridge, NJ) |
High temperature fluorinated polyimides
I claim: 1. A high temperature fluorinated polyimide having repeating polymer units of the formula ##STR17## wherein X is aromatic or aliphatic. 2. The high temperature fluorinated polyimide as recite... Read More
Inventors: Scola, Daniel A.;, Assignee: United Technologies Corporation (Hartford, CT) |
Novel alicyclic polyimides and a process for making the same
OF THE INVENTION The polyimides of this invention are derived from alicyclic dianhydrides and aliphatic, alicyclic, or aromatic diamines. The polyimides of this invention correspond to repeat units o... Read More
Inventors: Summers, John D.; Jeanes, Thomas O.;, Assignee: The Dow Chemical Company (Midland, MI) |
Method for production of modified polyesters
OF THE PREFERRED EMBODIMENT The polyalkylene glycol of the above general formula (I) (hereinafter referred to simply as polyalkylene glycol), which is used in accordance with this invention, is a com... Read More
Inventors: Chujo, Noboru; Mori, Shigeo;, Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd. (Kyoto, JP) |
Process for producing porous aromatic polyimide membranes
OF THE INVENTION In the process of the present invention, it is important that an aromatic polyamic acid to be converted to a corresponding aromatic polyimide is dissolved in a specific solvent mixtu... Read More
Inventors: Makino, Hiroshi; Kusuki, Yoshihiro; Harada, Takashi; Shimazaki, Hiroshi; Isida, Tosio;, Assignee: Ube Industries, Ltd. (Ube, JP) |
Polyimide gas separation membranes
The present invention relates to the discovery that aromatic polyimides prepared by polycondensation of dianhydrides with phenylene diamines having substituents on all positions ortho to the amine fu... Read More
Inventors: Hayes, Richard A.;, Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Polyimide gas separation membranes
The present invention relates to the discovery that aromatic polyimides prepared by polycondensation of dianhydrides with methylene dianilines having substituents on all positions ortho to the amine ... Read More
Inventors: Hayes, Richard A.;, Assignee: E. I. Du Pont De Nemours and Company (Wilmington, DE) |
Foam-destroying process
In accordance with the present inventive concepts, there is provided an economical process for preventing foamy boilovers, by the advantageous procedure of flowing an air stream over and directed at t... Read More
Inventors: Thelin, Ramona;, Assignee: |
Epoxy adhesive film for electronic applications
The adhesive composition of the present invention may be produced by combining an effective amount of the phenoxy resin, the fluorene curative, Y.sub.E and/or Z to provide an adhesive having the char... Read More
Inventors: Schenz, James L.;, Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN) |
Process for the preparation of N-alkylated anilines
OF THE INVENTION Aluminum oxide/hydroxide hydrates for the preparation of the catalysts to be used in accordance with the invention can be prepared by hydrolysis of aluminum salts, aluminum alcoholat... Read More
Inventors: Wimmer, Peter; Buysch, Hans-Josef; Puppe, Lothar; Froehlich, Christian;, Assignee: Bayer Aktiengesellschaft (Leverkusen, DE) |
FLC device with color filter and insulating protection layer with pencil hardness of at least HB
A principal object of the present invention is to provide a ferroelectric liquid crystal device capable of stably effecting a color display, particularly a color television display, for a long period ... Read More
Inventors: Sekimura, Nobuyuki; Yoshida, Akio; Kuribayashi, Masaki; Kamio, Masaru; Takao, Hideaki; Murata, Tatsuo;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Active-matrix substrate
Accordingly, a first object of the present invention is to equalize the alignment control of an active-matrix liquid crystal display device, and to improve an aperture ratio of an active-matrix liquid... Read More
Inventors: Noda, Kazuhiro; Nakamua, Shinji; Hayashi, Hisao; Kadota, Hisashi;, Assignee: Sony Corporation (Tokyo, JP) |
Reflecting cholesteric LCD having viewer side layer which either scatters or transmits light depending on angle
The present invention was made in consideration of these problems. The main object of the present invention is to provide an improved reflecting liquid crystal display unit. Another object of the pres... Read More
Inventors: Hashimoto, Kiyofumi; Hatano, Takuji; Okada, Masakazu;, Assignee: Minolta Co., Ltd. (Osaka, JP) |
Diamino compounds, polyamic acids, polyimides, liquid crystal aligning films using said polyimide films and liquid crystal display devices using said aligning films
What is claimed is: 1. A diamino compound represented by the formula [1]: ##STR209## in which G.sub.1 is a trivalent organic group of 2-20 carbon atoms, G.sub.2 is independently a single bond, --COO--... Read More
Inventors: Kato, Takashi; Otsuka, Nobuyuki; Murata, Shizuo; Sato, Hideo;, Assignee: Chisso Corporation (Osaka, JP) |
Process for producing regenerated collagen fiber
OF THE PREFERRED EMBODIMENTS The starting material which can be used in the present invention is a solution of solubilized collagen, i.e., a spinning dope, which can be prepared by solubilizing raw h... Read More
Inventors: Furukawa, Mitsuru; Takada, Masahiko; Murata, Shoichi; Sasayama, Atsushi;, Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha (Osaka, JP) |
LCD 
