High speed screen printing composition
CA 2022150 A1 · Owner: Moskowitz, Gerald · Inventors: Moskowitz, Gerald; Brown, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light sensitive screen printing composition containing A. a water soluble binder; and, B. a photosensitive component having both (a) and (b): (a) 4-diazo diphenyl amine condensed with formaldehyde and dissolved in phosphoric acid; and, (b) one or both of (i) and (ii): (i) the condensation product of 3-methoxy-4diazodiphenylamine bisulfate with 4,4'bis(methoxymethyl)diphenyl ether precipitated with methane sulfonate;, (ii) the condensation product of 3-methoxy-4diazo diphenyl amine bisulfate with 4,4'bis(methoxymethyl)diphenyl ether dissolved in phosphoric acid; and, C. water.
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 July 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 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.