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. 14, 1984
Filed:
Apr. 04, 1982
Ricardo C Pastor, Manhattan Beach, CA (US);
Antonio C Pastor, Santa Monica, CA (US);
Luisa E Gorre, Oxnard, CA (US);
Remedios K Chew, Canoga Park, CA (US);
Hughes Aircraft Company, El Segundo, CA (US);
Abstract
The specification discloses new and improved processes for forming water-free metal or non-metal oxide materials, which may then be melted and formed into optical components in vitreous or crystal form, which are free of the hydrogen-impurity absorption in the near infrared wavelength range. In one process, a water-free oxide is prepared by reacting a chosen nonpolar compound containing the desired metal or non-metal with an aprotic oxygen-containing compound to form the oxide as a precipitate in a chosen aprotic nonaqueous liquid solvent which provides a water-free environment during the formation of the oxide, to prevent the inclusion of water and water-derived impurities in the oxide as formed. Then the oxide-containing precipitate is subjected to a reactive atmosphere process by exposing the powder to a chosen gas phase reactive atmosphere comprising atomic halogen at a predetermined elevated temperature for a predetermined period of time, to remove traces of water and water-derived impurities from the oxide.