Expired Canadian patentCanada
Dentifrice compositions
CA 1281658 C · Owner: Fujita, Keijiro · Inventors: Fujita, Keijiro; Kuboki, Yoshinori; Fujimoto, Daisaburo
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a dentifrice composition for preventing dental caries, the dentifrice composition containing hydroxyapatite in which glucanase is immobilized.
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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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 10, 1986
GrantedMarch 19, 1991
Term endedMarch 19, 2008
Patent numberCA 1281658 C
Classification (IPC)A61K8/24 +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.