Expired Canadian patentCanada
Composition and method of inhibiting corrosion by water of metal substrates
CA 1201958 A · Owner: Roquette Freres · Inventors: Lumaret, Jean-Claude; Gosset, Serge; Huchette, Michel
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for inhibiting corrosion by water of metal substrates comprises zinc gluconate or glucoheptonate and at least one water-soluble inorganic polyphosphate.
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 March 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 30, 1982
GrantedMarch 18, 1986
Term endedMarch 18, 2003
Patent numberCA 1201958 A
Classification (IPC)C23C22/17 +1 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.