Business form or mailer having an imagable surface
CA 2091153 C · Owner: Standard Register Company (The) · Inventors: Skees, Hugh B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mailer or business form is provided including a coating of a first colorless reactant on one sheet thereof and a transparent patch overlying the coating. The surface of the patch facing the sheet includes a coating of a second colorless reactant such that when the transparent patch is impacted by an imaging force, a visible image is formed which may be viewed.
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 March 5, 1993 and granted January 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2015.
- 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.