One part solventless conformal coatings
CA 2064989 A1 · Owner: Houghtaling, Dawn M. · Inventors: Vanwert, Bernard; Houghtaling, Dawn M.; Houghtaling, Dawn M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A one-part, solventless silicone conformal coating for use in protecting printed circuits is obtained by mixing a diorganovinyl endblocked polydiorganosiloxane an organo-, siloxane containing at least 3 silicone bonded hydrogen atoms per molecule, a platinum catalyst an adhesion, additive and a cure inhibitor. The adhesion additive is from 1.5 to 2 parts by weight of a mixture of a polysiloxane having both hydroxyl radicals and vinyl radicals and a silane having at least one epoxy-containing group and at least one silicon-bonded alkoxy group, the ratio of the first to the second of from 0.25 to 1.8 parts by weight. The cure inhibitor is less than 0.25 part by weight of an …
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 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 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.