Anticalculus/antiplaque compositions using azacycloalkane diphosphonates
CA 2086620 C · Owner: The Procter & Gamble Company · Inventors: Smitherman, Herbert C.; Nelson, Dennis G. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Azacycloalkane diphosphorates are used in combination with antimicrobials especially 5-chloro-2-(2,4-dichlorophenoxy) phenol, to provide anticalculus and antiplaque benefits on teeth. Oral care compositions such as dentifrices mouthwashes, and the like, are provided.
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
- Filed July 11, 1991 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.
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.