Photocurable cyclobutarene compositions
CA 2125567 A1 · Owner: Moyer, Eric S. · Inventors: Moyer, Eric S.; Harris, Robert F.; Oaks, Frank L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Photocurable cyclobutarene compositions having a low dielectric constant, low moisture uptake, enhanced oxidative stability good , processability, good planarization and a long shelf life are, disclosed. These polymer compositions are useful in composites laminates, membranes, films, adhesives coatings, and electronic, applications such as multichip modules and printed circuit boards. An example of such photocurable cyclobutarene compositions is a mixture of a photosensitive agent such as 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone and a cyclobutarene such as oligomeric divinyltetramethyldi-siloxane bisbenzocyclobutane.
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 December 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2014.
- 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.