Carbamate/urethane composition and textile lamination process
CA 2113204 C · Owner: Crowther, Glenn William · Inventors: Crowther, Glenn William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A storage stable adhesive mixture of hexamethylenediamine carbamate and the reaction product of ethylene/propylene oxide polyol and a polyurethane prepolymer of diphenyl methane diisocyanate polytetramethylene glycol, and optionally 1,4-butanediol; and a process for using the adhesive to laminate fabric to polymeric membrane is also described.
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 28, 1993 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2015.
- 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.