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:
Jan. 08, 1991
Filed:
Nov. 25, 1987
Applicant:
Inventors:
Louis A Cutter, Allegheny, PA (US);
Richard A Ganger, Carmel Valley, CA (US);
John J Godfrey, Murrysville, PA (US);
Assignee:
Aristech Chemical Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08L / ; C08F / ;
U.S. Cl.
CPC ...
525 23 ; 525 40 ; 523501 ; 526319 ; 526199 ;
Abstract
Particle size, swelling, and other characteristics of unsaturated polyester beads are controlled in a suspension polymerization system to make beads suitable for use as fillers in molding and forming. Process steps include degassing prior to polymerization, positive pressure during polymerization, and washing to remove suspending agent.