A delivery system for a tooth whitener using a strip of material having low flexural stiffness
CA 2629331 A1 · Owner: Rohman, Frederick J. · Inventors: Rohman, Frederick J.; Sagel, Paul A.; Dirksing, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for delivering a tooth whitening substance to a plurality of adjacent teeth, the delivery system comprising a strip of flexible material having a sufficient , flexibility to form a curbed shape on a plurality of adjacent teeth and a tooth , whitening substance. The strip of material is readily conformable to the teeth surfaces , and to interstitial tooth spaces without permanent deformation when the delivery , system is placed thereagainst. The tooth whitening substance is applied to the strip of , material such that when the delivery system is placed on the surface of the teeth, the , substance contacts the surface providing an active onto the surface. The substance , also …
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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
- Filed June 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 2020.
- 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.