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:
Mar. 24, 1987
Filed:
Jun. 14, 1985
Applicant:
Inventor:
Carl A Chiulli, Randolph, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; B29C / ;
U.S. Cl.
CPC ...
264 49 ; 21050027 ; 210652 ; 264156 ;
Abstract
A surface-type microporous filter is prepared by embossing substantially uniform holes in an embossable polymer carried on a porous support wherein the pores are filled with a soluble filler. Subsequent to the embossing step, the filler is removed by dissolution.