Spandex formed with a mixture of diamines
CA 1298024 C · Owner: Lodoen, Gary A. · Inventors: Lodoen, Gary A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Article of Spandex Polymer, ABSTRACT A shaped article of a polyurethane-urea spandex formed from polyalkaneether glycol that was capped with tertiary aralkyl diisocyanate and then chain extended with a specific tricomponent diamine mixture has unexpectedly good heat settability. The diamine mixture comprises 25 to 80% of hydrogenated m-phenylenediamine 10 to 50% of hydrogenated p-phenylenediamine and 10 to 30% of tetrachloro-p-xylylenediamine.
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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.