POLYMERIC VEHICLES AS CARRIERS FOR NASA Case No. ARC-10325 *See address below. Canada, Japan, West Germany, Great Britain [Corresponding to U.S. Patent No. 3,663,464] Intumescent coatings when applied to the surface of an article provide protection from fire and heat. Many applications of the coatings (or paints) are envisioned which include use in schools, homes, office buildings, ships, spacecraft, aircraft, etc. This invention relates to an intumescent agent which contains the ammonium salt of 4-nitroaniline-2-sulfonic acid and a polymer of the mercaptan type which may contain disulfide linkages or polyoxyalkylene linkages. The adhesion and char resistance of such compositions can be further improved by the addition of epoxy resins. The composition exhibits high hydrolytic stability. *Exclusively licensed to Avco Corporation. Please direct inquiries to: Fire Protection Materials, Avco Corporation, Avco Systems Division, Lowell Industrial Park, Lowell, Massachusetts 01851. ANTI-GLARE IMPROVEMENT FOR NASA Case No. NPO-10337 Belgium, Canada, France, Great Britain, Address inquiries to: 4800 Oak Grove Drive [Corresponding to U.S. Patent No. 3,488,103] This invention is directed to an anti-glare baffle for shading rays. such as light rays or other radiant energy rays which emanate from outside a desired field of view. The device may find use in sensitive still and movie cameras, light meters, telescopes, radiometers, photometers, electro-optical position sensors, photocell shades, star tracking devices and the like. The anti-glare baffle has a specularly reflective surface formed from an oblate hemispheroid. A shading flange extends inwardly from the upper edge of the hemispheroid and intersects the foci of the oblate hemispheroid. The oblate hemispheroid and flange surround a viewing aperture and spaced ray detecting device. METHOD FOR THE REPAIR AND MAINTENANCE NASA Case No. ERC-10338 Canada Address inquiries to: Marshall Space Flight Center Attn: Patent Counsel Mail Code: A&PS-PAT Marshall Space Flight Center, AL 35812 [Corresponding to U.S. Patent No. 3,679,360] A process for the preparation of calcium phosphate salts wherein a calcium phosphate salt is deposited from a gel medium onto the surface of a tooth. The use of the gel diffusion process to deposit the constituents of tooth enamel onto the surface of a weak or damaged tooth and thereby effect repair of the tooth is disclosed. USE OF UNILLUMINATED SOLAR CELLS AS SHUNT DIODES FOR A SOLAR ARRAY NASA Case No. GSC-10344 Canada, France, Netherlands, Address inquiries to: Goddard Space Flight Center Attn: Patent Counsel Mail Code: 204 [Corresponding to U.S. Patent No. 3,672,999] An improvement has been made in the electrical interconnection of solar cells in an array of solar batteries. Each individual cell of a shaded battery is electrically connected in parallel with a corresponding cell of an illuminated solar battery. The p-n junction solar cell of the shaded battery provides a forward biased diode equivalent in a by-pass conducting path around the corresponding illuminated cell in the event it becomes non-conductive. Thus, uninterrupted current flow is maintained in the event the illuminated cell fails to function. POTASSIUM SILICATE-ZINC COATINGS NASA Case No. GSC-10361 Australia, Belgium, Canada, Address inquiries to: Goddard Space Flight Center Attn: Patent Counsel Mail Code: 204 Greenbelt, MD 20771 [Corresponding to U.S. Patent No. 3,620,784] Zinc dust coatings which, when dried on a metal surface, are crack, craze, and abrasion resistant. The coatings are formed by combining a potassium silicate solution with zinc dust and, optionally, including an alkyl trialkoxysilane. These compositions of basically inorganic materials are intended primarily for the protection of metals subject to adverse environmental conditions. |