Orthodontic bracket adhesive compositions
CA 1261992 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Randklev, Ronald M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Orthodontic Bracket Adhesive Composition" ABSTRACT, The invention relates to an article of manufacture comprising an orthodontic bracket adhesive composition consisting essentially of a finely divided, non-toxic inorganic filler admixed with a polymerizable resin, said filler being essentially insoluble in mouth fluids, having a Mohs hardness less than 3 and a mean particle diameter between 1 and 100 micrometers with, said filler being at least 25% of the total weight of said composition, and with said adhesive composition being disposable between tooth enamel and an orthodontic bracket and being substantially free of adjuvants in amounts which would damage said tooth enamel upon removal of …
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
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.