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. 04, 1980
Filed:
Nov. 06, 1979
Applicant:
Inventor:
David E Birt, London, GB;
Assignee:
E M I Limited, Middlesex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ; B29D / ;
U.S. Cl.
CPC ...
425385 ; 425810 ; 425411 ;
Abstract
A means for moulding thermoplastics video discs having one or two shaped resilient compensators to maintain the stamper plates in parallelism with the plastics foil during moulding. The compensators may be of a rubber and may contain a thermally conductive material.
Birt, David. (1980). Moulding video discs (U.S. Patent No. 4231730). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4231730
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile