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. 01, 1983
Filed:
Aug. 14, 1981
Geoffrey W Green, Malvern, GB;
Alan H Lettington, Worcester, GB;
National Research Development Corporation, London, GB;
Abstract
A shaped element of germanium or silicon is coated with a layer of hard infra red transparent carbon. The carbon is deposited on the element, used as a cathode, in a glow discharge charge chamber by applying a D.C. voltage to a hydrocarbon gas at a pressure of e.g. 10.sup.-1 to 10.sup.-2 Torr. Prior to depositing the carbon the element may be heated and cleaned using argon ion bombardment. Layers of germanium and silicon may also be deposited using the gases germane and silane respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile