No thermal cure dry film solder mask
CA 1291588 C · Owner: Hercules Incorporated · Inventors: Scheve, Bernard Joseph; Brungardt, Clement Linus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of Disclosure Disclosed are dry film solder mask compositions containing a binder material that is the reaction product of: (a) a polymerized mixture of polypropyleneglycol monomethacrylate, methacrylic acid and, preferably specific, acrylates and methacrylates; and (b) isocyanatoethyl methacrylate. The masks are equal or superior to current dry film masks in affording protection to circuit boards.
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
- Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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.