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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.:

US 4526874 B1

PDFFull Text
Date of Patent:
Jul. 02, 1985

Filed:

Apr. 27, 1983

Optical light weight glass with a refractive index of >1.70, an abbe

Applicant:
Inventors:

Danuta Grabowski geb Marszalek, Wiesbaden, DE;

Ludwig Ross, Klein-Winternheim, DE;

Volkmar Geiler, Mainz-Finthen, DE;

Karl Mennemann, Taunesstein, DE;

Assignee:

Schott Glaswerke, Mainz, DE;

Attorney:

Haight & Associates

Primary Examiner:

Mark Bell

Int. Cl.
CPC ...
C03C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 77 ; 501 58 ; 501 59 ; 501 61 ; 501 62 ; 501 63 ; 501 64 ; 501 65 ; 501 66 ; 501 67 ; 501 75 ; 501 76 ; 501 78 ; 501 79 ; 501901 ; 501903 ;
Abstract

An optical glass with the familiar optical position of n.sub.d >1.70 and v.sub.d >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent by weight): SiO.sub.2 25-42, TiO.sub.2 15-35, B.sub.2 O.sub.3 0.5-7, BaO 3-13, CaO 1-3, Nb.sub.2 O.sub.5 1-20, GeO.sub.2 0-2, Al.sub.2 O.sub.3 0-4, Na.sub.2 O 7.5-15, Li.sub.2 O 0-9, K.sub.2 O 2-10, SrO 0-6, ZnO 0-5, ZrO.sub.2 0-3, and WO.sub.3 0-3.

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Grabowski geb Marszalek, Danuta. (1985). Optical light weight glass with a refractive index of >1.70, an abbe (U.S. Patent No. 4526874). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4526874

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