Expired Canadian patentCanada
Quaternized and crosslinked polyepihalohydrin thickening agent
CA 1059693 A · Owner: B.F. Goodrich Company (The) · Inventors: Schlatzer, Robert K. (Jr.); Tucker, Harold A.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Epihalohydrin polymers are both quaternized and lightly crosslinked by reaction with N,N-dimethylethanolamine. The quaternized and lightly crosslinked polymers are effective water thickening agents. - 1 -
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 31, 1979
Term endedJuly 31, 1996
Patent numberCA 1059693 A
Classification (IPC)C08G65/24 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.