Adhesive composition
CA 2045671 A1 · Owner: Gaf Corporation · Inventors: Gangadharan, Balgopal; Haldar, Rama K.; Chaudhuri, Ratan K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition containing an adhesive suitable for affixing dentures or ostomy devices to a mucous membrane which adhesive is a, mixture composed of (a) 75-25 wt. % of a blend comprising a divalent calcium salt and a monovalent sodium salt of a lower alkyl vinyl ether/maleic acid copolymer wherein the concentration of Ca is between about 10 and 15 wt. % of the blend; Na is between about 1.5 and about 4 wt. % of the blend and -COOH is between about 9 and about 25 wt. % of the blend; (b) 0-10 wt. % of a lower alkyl vinyl ether/maleic acid auxiliary metal salt wherein said metal is divalent magnesium and/or monovalent potassium and wherein said auxiliary metal represents between about 1.5 and …
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 January 17, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2012.
- 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.