Flame-retardant, vapor-permeable waterproof structure
CA 1319802 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Dodia, Harshad Ramchandra; Ostapchenko, George Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title, Flame-Retardant. Vapor-Permeable Waterproof Structure, A flame resistant copolyetherester elastomer film composition comprising, (a) 60-85 weight percent of a hydrophilic copolyetherester elastomer film having a thickness of 0.3-1.6 mils, a water vapor transmission rate of at least 7,000 gm.mil/m2/24 hours and an elongation of at least 600% with said hydrophilic elastomer film consisting essentially of a multiplicity of long chain ester units and short chain ester units joined head-to-tail through ester linkages, said long chain ester units being represented by the formula and said short chain ester units represented by the formula, where G is a divalent radical remaining after the …
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 July 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 2010.
- 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.