Rechargeable inking member
CA 2083029 C · Owner: Terry, Betty R. · Inventors: Terry, Betty R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rechargeable ink pad having particular use with solution ink. The ink pad has a bottom layer of porous polychloroprene latex foam with pore sizes of 200µ to 500µ and a top layer of polyethylene foam with pore sizes of 10 to 20µ. The two layers are secured to one another by a fusible web adhesive. A method of customizing the porous polychloroprene latex layer to obtain desired properties by felting has been discovered. Such felting renders the finished porous polychloroprene latex foam suitable for controlled ink flow required for printing purposes.
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 November 16, 1992 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.