Polyimide composition and prepreg and laminate thereof
CA 2012633 C · Owner: Sawa, Yoshihide · Inventors: Yoshioka, Shingo; Yoshimitsu, Tokio; Ogasawara, Kenzi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyimide composition is obtained by adding triallyl isocyanurates to polyimide, preferably with further addition of an accelerator and diluting solvent. The composition is made to show effective reduction in dielectric constant as well as in the inherent viscosity and surface tension so that, when employed in manufacturing laminates, the degree of impregnation into base material can be elevated to remarkably improve resin filling.
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 March 20, 1990 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2012.
- 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.