Radiation sensitive compositions
CA 2024976 C · Owner: Etherington, Terence · Inventors: Wade, John Robert; Etherington, Terence; Folkard, Christopher Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radiation sensitive composition comprises a radiation sensitive material and a dye which dye undergoes a colour change in the radiation-s-truck areas on image-wise exposure of the composition and a colour change when the exposed and developed composition is heated to a temperature of at least 180°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 September 10, 1990 and granted July 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.