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:
Jun. 01, 1976
Filed:
Feb. 24, 1975
George L Gaines, Jr, Scotia, NY (US);
Donald G LeGrand, Burnt Hills, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method for making thin, substantially uniform and self-supporting polymer films by forming a solution of a base polymer, a surface-active block copolymer and a solvent, and forming a film from said solution by contacting it with film-forming means. The block copolymer contains at least two polymerized comonomers, one of which is compatible or substantially miscible with the base polymer and serves to distribute the block copolymer therein and the second of which is sufficiently surface-active in the resulting polymer solution to produce a solution having a surface tension sufficiently low to allow the formation of useful films less than 50 microns in thickness.