Photoimageable composition having improved flexibility
CA 2266159 A1 · Owner: Lundy, Daniel E. · Inventors: Barr, Robert; Lundy, Daniel E.; Wheeler, Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a negative-acting photoimageable composition comprising A), between about 30 and about 80 wt% based on total weight of A) plus B) of a binder polymer, having acid functionality sufficient to render said photoimageable composition developable in, alkaline aqueous solution B) between about 20 and about 70 wt% based on total weight of A), plus B) of an addition-polymerizeable non-gaseous .alpha..beta.-, ethylenically unsaturated compound(s) capable of forming a high polymer by free-radical initiated chain-propagating addition, polymerization, at least about 50 mole percent of the a,p-ethylenically unsaturated moieties of B), being methacrylic moieties and C) …
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 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2021.
- 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.