Fluidless masters
CA 1104433 A · Owner: Mazer Corporation (The) · Inventors: Radow, Robert S.; Panken, Irving; Briddell, Brian J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Preprinted duplicating masters for producing printed copies, with or without spirit duplicating fluids comprising a foundation sheet reverse printed in a predetermined pattern with an imaging material which produces copies upon the application of pressure alone although, the spirit duplicating process can be used. The imaging material is applied as a synthetic polymeric resin disperion having an ink composition therein and is subsequently heated to gel but not fuse the resin so that the ink composition will be retained therein but will be releasable and transferable in a predetermined pattern to a substrate by at least the application of pressure alone. A protective cover sheet is placed …
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 July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 1998.
- 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.