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:
Dec. 25, 1990
Filed:
Mar. 10, 1989
Applicant:
Inventors:
Albert V Scheer, Sittingbourne, GB;
Thijme Last, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B05D / ;
U.S. Cl.
CPC ...
428421 ; 427 38 ; 427 40 ; 427 41 ; 427243 ; 427244 ; 427245 ; 427247 ; 4274071 ; 4274072 ; 427409 ; 427421 ;
Abstract
The invention relates to a process for preparing non-porous membrane layers by applying a solution comprising a solvent and a (e.g. silicon-containing) polymer having a weight-average molecular weight of at least 300,000 Da onto a porous substrate(e.g. polypropylene) and allowing the solvent to evaporate.