Feldspar polishing composition
CA 1058521 A · Owner: Muhler, Joseph C. · Inventors: Alexander, Howard R.; Muhler, Joseph C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure: A specific particle size distribution of feldspar is employed as both a cleaning and a polishing agent for teeth. It consists initially of a powder that, preferably at the time of use is mixed, with a moistener and becomes a paste to be used by the dentist or dental hygienist. It can be combined with a humectant but in smaller proportions than heretofore. It can be used with or without a dental caries-reducing amount of a fluoride anticariogenic agent either stan-, nous or sodium fluoride, and is more effective than prior materials though mixed with much smaller quantities. It can be supplied in a sectional kit wherein the initially-separated wet and dry …
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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 July 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 17, 1996.
- 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.