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:
Aug. 29, 1989
Filed:
Dec. 24, 1987
Robert J Champetier, San Pedro, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
Apparatus and method for preventing the escape of contaminates outgassing from polymer materials within an enclosure. In an illustrative embodiment the invention provides an exhaust path for an electronic enclosure 10 containing polymeric materials (12,14). The exhaust path comprises a tubular member 16 which permits the atmospheric gases within the enclosure to escape from the enclosure during liftoff. Within the member are at least one region 26 containing an ionizing source, such as a radioactive substance which emits alpha particles. These alpha particles are relatively low energy particles and are stopped by a relatively thin layer of material. The radiation polymerizes, into a solid surface film 30 outgassing molecular species 28 as they traverse the inner region of the member. The use of the invention provides for permitting the atmospheric gasses within the enclosure to escape the enclosure during the initial ascent and, further, serves as a pathway and removal device for molecular contaminates.