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:
Jul. 19, 1994
Filed:
May. 30, 1990
Chia-Chih Ou, Lexington, MA (US);
Deborah Neumayer, Evanston, IL (US);
W. R. Grace & Co.-Conn., New York, NY (US);
Abstract
A method of rendering water resistant a vermiculite article such as a film or coating comprised of delaminated vermiculite lamellae is provided comprising the step of contacting the article with a solution of an inorganic monovalent cation selected from the group consisting of: H.sup.+, Na.sup.+, K.sup.+, Cs.sup.+, Rb.sup.+ and Fr.sup.+ and mixtures thereof. The invention further relates to a water resistant article such as a film or coating comprised of delaminated vermiculite lamellae, which article is produced by contacting the article with a solution of an inorganic monovalent cation selected from the group consisting of: H.sup.+, Na.sup.+, K.sup.+, Cs.sup.+, Rb.sup.+ and Fr.sup.+.