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:
Sep. 30, 1980
Filed:
Jan. 19, 1979
Applicant:
Inventors:
Harald Medem, Krefeld, DE;
Dieter Freitag, Krefeld, DE;
Hans Hespe, Leverkusen, DE;
Carl Heynemann, Taufkirchen, DE;
Assignee:
Bayer Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528176 ; 264-1 ; 3501 / ; 528128 ; 528173 ; 528191 ; 528192 ; 528194 ;
Abstract
Thermoplastic aromatic polyesters comprising cocondensed bisphenol residues generally have a refractive index n.sub.d of from 1.60 to 1.66, an Abbe coefficient v.sub.d of from 27 to 21 and a color triplet of about 5.1, 0.1, O and are excellent starting materials for the production of optical components, particularly high quality lenses for still and cine cameras.
Medem, Harald. (1980). Optical components consisting of aromatic polyesters molded in the form (U.S. Patent No. 4225698). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4225698
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile