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. 27, 1979
Filed:
Jul. 07, 1978
Henry Alsberg, Northbrook, IL (US);
Dale Skalla, Cicero, IL (US);
William C Meisenhelder, Downers Grove, IL (US);
The Richardson Company, Des Plaines, IL (US);
Abstract
Phonograph record molding compositions having polystyrene as the major constituent are formulated to have wear resistance properties superior to other polystyrene injection molded compositions while generally retaining the transparency of unmodified polystryene. Ethylene-bis-stearamide or a homolog or analog thereof is dissolved within styrene monomer and then the monomer is polymerized to obtain a polystryene matrix having a molecular distribution of ethylene-bis-stearamide or the like within and throughout the matrix. Preferably, the ethylene-bis-stearamide or the like is combined with a wax such as an olefin-based wax or a microcrystalline wax.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile