Desensitizable record material
CA 2092233 C · Owner: Schleicher, Lowell · Inventors: Feldman, Lucy; Schleicher, Lowell; Miller, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel record material is disclosed comprising a substrate bearing microcapsules, having nonmeltable walls. The microcapsules contain a chromogen or developer and a, photosensitive composition internal thereof said microcapsules undergoing a , change in viscosity upon exposure to actinic radiation. The walls of the microcapsules have an, elongation of not more than 1% and the record material is resistant to heat measured by not, producing any substantial color when placed in a 150°C oven for one minute. Surprisingly, the record material however is capable of forming a color upon application to the record, material of a point source energy input comprising a .DELTA.T of at least 115°C …
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 23, 1993 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 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.