Expired Canadian patentCanada
Products for treating surfaces
CA 1338435 C · Owner: Holker, Kenneth Urmston · Inventors: Holker, Kenneth Urmston; Collier, John Richard
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silica products obtained from trivalent metal e.g. Al compounds and silica can be used as corrosion inhibitors or adhesion promoters for organic coatings on surfaces by way of norinse or phosphating treatment or as pigments.
Read the whole patent
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 9, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 23, 1987
GrantedJuly 9, 1996
Term endedJuly 9, 2013
Patent numberCA 1338435 C
Classification (IPC)C09D5/08 +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.