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:
Aug. 01, 1989
Filed:
Mar. 21, 1988
Applicant:
Inventors:
Donald E Hostetler, West Chester, PA (US);
Michael J Cannarsa, Lafayette Hill, PA (US);
Haven S Kesling, Jr, Drexel Hill, PA (US);
Hsiang-Ning Sun, Houston, TX (US);
Assignee:
Arco Chemical Technology, Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
528494 ; 528370 ; 528493 ; 528495 ; 528499 ; 528503 ;
Abstract
The selection of the proper solvent systems for polyalkylene carbonates which completely dissolve the polymer at high temperatures but are non-solvents at lower temperatures allows one to obtain discrete particles of the polymers suitable for many applications, processing and handling. The particles size can be controlled from about 30 to about 3000 microns in diameter.