Photoimageable polyimide coating
CA 2040994 A1 · Owner: Ngo, David D. · Inventors: Ngo, David D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Of the Invention, A photoimageable polyimide coating which can be prepared from the polymeric condensation product of 6FDA DMDE or, MEDA, and a photosensitizing moiety. More particularly the, present invention relates to a photoimageable polyimide coating useful for microelectronic applications. 28,188R4
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 April 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2013.
- 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.