Improved flossing apparatus
CA 2175618 C · Owner: Wilson, Richard · Inventors: Walter, James; Wilson, Richard; Spencer, John W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article is provided for facilitating oral prophylaxis. The article comprises a continuous, elongated fiber of polytetrafluoroethylene having at least one substantially rigid first portion and a substantially flexible second portion comprised of expanded polytetrafluoroethylene.
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 May 2, 1996 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2018.
- 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.