Expired Canadian patentCanada
Water and oil repellant
CA 1338989 C · Owner: Asahi Glass Company Ltd. · Inventors: Maekawa, Takashige; Ito, Katsuji; Matsuo, Masashi
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 water and oil repellant comprising, as effective component, polymer particles each containing at least two polymers, wherein at least one of said at least two polymers is a polymer containing a polyfluoroalkyl group.
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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 March 11, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 7, 1989
GrantedMarch 11, 1997
Term endedMarch 11, 2014
Patent numberCA 1338989 C
Classification (IPC)C08F259/08 +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.