Melt-fusible polyimides
CA 1268593 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Gannett, Thomas Papin; Kassal, Robert James; Uradnisheck, Julius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Melt-fusible copolyimides based on, pyromellitic anhydride and two defined classes of aromatic diamines, at least one diamine of each class being incorporated into the polyimide, each diamine class being present in an amount of 10-90 mole percent of the total diamine content (100 mole percent), melt below about 400°C and can be fabricated into articles, or can be applied to either fibrous or nonfibrous substrates to make prepregs tapes, etc. which then are shaped into final articles, such as printed circuit boards or aircraft panels.
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 May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
- 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.