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:
Apr. 26, 1977
Filed:
Jan. 22, 1976
Applicant:
Inventors:
Thomas H Elmer, Corning, NY (US);
Helen Walters, Painted Post, NY (US);
Assignee:
Corning Glass Works, Corning, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
65 3 / ; 65 31 ; 156 663 ;
Abstract
A method for providing broad-band antireflective surface layers on a chemically durable borosilicate glass which comprises phase-separating the glass by heat treatment at 630.degree.-660.degree. C., removing a siliceous surface layer from the glass, and treating the glass in an aqueous solution containing both H.sup.+ ions and F.sup.- ions for a time sufficient to produce the antireflective surface layer, is described. Antireflective surface layers exhibiting reflectances as low as 0.5% throughout the wavelength range from about 0.4-2.0 microns have been produced.