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| Number | Title | Issue Date |
| 4575834 | Method of improving the signal-to-noise ratio in a capacitance electronic disc system The audio signal-to-noise ratio obtainable in a capacitance electronic disc system which includes a conductive disc formed from a plastic resin containing conductive particles and a playback stylus is increased by spacing the playback stylus at a slight d... | 03/11/1986 |
| 4512916 | Video disc molding composition A conductive molding composition for the compression molding of high density information discs (video discs). The composition includes a polyvinylchloride-based resin containing sufficient carbon black particles to obtain a desired conductivity (bulk resi... | 04/23/1985 |
| 4504519 | Diamond-like film and process for producing same An amorphous, carbonaceous, diamond-like film and a process for producing the same is disclosed. The film has an extremely low hydrogen content and an extremely low stress, is resistant to both acids and alkalis, and adheres tenaciously to many types of s... | 03/12/1985 |
| 4479851 | Purification of video disc lubricant additives An improved process for the batch distillation or purification by stripping of a bis(hydroxyalkyl)disiloxane, which purified product is useful as a video disc lubricant additive or dopant. In accordance with the process, the feedstock of bis(hydroxyalkyl)... | 10/30/1984 |
| 4405541 | Video disc processing High density information discs, such as video discs, which have been treated with an ammonium salt become resistant to and stable under conditions of high relative humidity, even after repeated exposure to such conditions for extended periods of time. The... | 09/20/1983 |
| 4378310 | Conductive molding composition An improved molding composition having a high thermal stability, including a vinyl chloride/vinyl acetate copolymer-based resin, sufficient finely divided conductive particles to obtain the desired conductivity, and from 3 to 20 weight percent of the modi... | 03/29/1983 |
| 4376087 | Processing of video discs High density information discs, such as video discs, which have been treated with a fluorinating agent become resistant to and stable under conditions of high temperature and high relative humidity, even after exposure to such conditions for extended peri... | 03/08/1983 |
| 4368636 | System for handling a volatile and flammable liquid A system and process for the safe supply, distribution, and delivery of a highly volatile and flammable liquid from a contained source of supply of the liquid remote from a closed work environment to a process area within the closed work environment inclu... | 01/18/1983 |
| 4259421 | Improving etch-resistance of casein-based photoresist pattern The etch resistance of a casein-based photoresist pattern to low specific gravity ferric chloride-based etchant solutions is increased by treating the photoresist pattern with a methylene blue solution, containing at least 0.1 weight percent methylene blu... | 03/31/1981 |
| 4237210 | Aqueous photoresist method A process of producing a photoresist pattern on a circuit board including applying a casein based photoresist film of a thickness of at least 4.0 micrometers to a circuit board, air drying the film, exposing the dried film to actinic radiation through a p... | 12/02/1980 |
| 4230794 | Improving etch resistance of a casein-based photoresist The etch resistance of a casein-based photoresist pattern to low specific gravity ferric chloride based etchant solutions is increased by treating the photoresist pattern with a formaldehyde solution containing at least 10 percent formaldehyde by volume b... | 10/28/1980 |
| 4220706 | Etchant solution containing HF-HnO3 -H2 SO4 -H2 O2 An etchant solution for multilayered metal layers comprising an aqueous solution of from 0.5 to 50 percent by weight of nitric acid, from 0.03 to 1.0 percent by weight of hydrofluoric acid, from 0.05 to 0.5 percent by weight of hydrogen peroxide and from ... | 09/02/1980 |
| 4169807 | Novel solvent drying agent Mixtures of 1-propanol, water and certain perfluoro compounds form excellent drying agents for silicon based devices. The mixtures have good wetting properties and form azeotropic mixtures in the vapor phase.... | 10/02/1979 |
