The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1983
Filed:
May. 04, 1981
Samuel S Brody, Pittsford, NY (US);
Other;
Abstract
Fogging by the condensation of water vapor on optically transmissive surfaces of optical devices, such as the lens of goggles, is prevented by means of a transparent hydrophylic polymer integrated therewith and disposed in the moisture laden environment. A perfluorosulfonic acid polymer, such as is sold under the trademark Nafion by Du Pont, is used. The polymer is attached to the surface of the lens which faces the wearer of the goggles, as by being laminated to the lens. The polymer provides a transparent regeneratable dessicant, even though it is attached to the non-permeable lens, and removes water before it can condense as droplets to fog the lens. There also may be characteristics of the hydrophylic polymer other than that of a dessicant which is significant in the fog prevention (e.g. contact angle of water droplets on the surface).