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:
Sep. 14, 1993
Filed:
May. 30, 1990
Applicant:
Inventors:
Chia-Chih Ou, Lexington, MA (US);
Deborah Neumayer, Evanston, IL (US);
Assignee:
W. R. Grace & Co.-Conn., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
428446 ; 106D / ; 2523 / ; 4274301 ; 427421 ; 428409 ;
Abstract
A water resistant or repellant article comprised of delaminated vermiculite lamellae is provided, which article is produced by immersing the article in a solution of a cationic exchange agent. The invention further relates to a method of producing such a water resistant or repellant article comprising the step of contacting the film with a solution of a cationic exchange agent.