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. 04, 1977
Filed:
Nov. 19, 1973
William J Davis, Wyomissing, PA (US);
Anthony J Izbicki, Reading, PA (US);
Other;
Abstract
Polymeric bodies having selected morphological properties are prepared by effecting an apparent increase in the glass transition temperature of the polymer to cause it to become glassy and manipulating the polymer while it is in the glassy state. In the preferred practice of the invention, the apparent increase in the glass transition temperature is a reversible function so that after the morphological properties of the polymer have been developed, the normal glass transition temperature of the polymer may be restored. The process of this invention finds utility in the preparation and formulation of polymers in powdered form; it provides a practical method for the formation of powders in unusual size ranges, which, in turn, makes possible the formation of shaped articles by novel processes; and it provides a simple method for making products, such as open-cell foams and surfaces in relief, that have unique physical characteristics.