Radiation crosslinking copolymer of ethylene and vinyl acetate with polyisobutylene for skin barrier
CA 1261299 A · Owner: Hollister Incorporated · Inventors: Osburn, Frank G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A skin barrier composition is provided which is composed of a mixture of a copolymer resin of ethylene and vinyl acetate (EVA) and a water-insoluble dry tack-providing elastomer such as polyisobutylene, the mixture being free of resin monomer or polymer capable of irradiation crosslinking with the EVA copolymer and the elastomer being present in amounts of 25-55% by weight of the composition. A hydrocolloid may also be included. The composition after mixing and molding, is subjected to ionizing irradiation to form crosslinked polymer networks of the EVA. The compositions have exceptional properties for use as barrier sheets, rings, or strips in ostomy, wound drainage and, incontinence …
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.