Wound dressings in sheet or gelled paste form
CA 1305069 C · Owner: Medi-Tech International Corporation · Inventors: Cornell, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gel composition in the form either of a transparent sheet or paste is provided for dressing skin wounds. When the dressing is in the form of a sheet, the composition comprises dextrin and a water-swellable,cross-linked polymer selected from polyacrylamide or polymethacrylamide. The ratio of dextrin to polymer ranges from about 2:1 to 1:1. When the dressing is in the form of a paste the composition comprises a non-crosslinked nonionic polyacrylamide or polymethacrylamide in combination with a cross-linked salt of polyacrylic or polymethacrylic acid and water. The ratio of nonionic to cross-linked polymer is from about 1:2.5 to 1:15; while the ratio of water to combined nonionic and …
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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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
- 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.