Removal of surface contaminants by irradiation
CA 2132332 C · Owner: Cauldron Limited Partnership · Inventors: Dehais, Joseph A.; Engelsberg, Audrey C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for removing surface contaminants from a planar or irregularly shaped surface of a substrate (12 70) by high-energy irradiation isprovided. The invention enables removal of surface contaminants without alteringthe underlying molecular crystal structure of the substrate (12 70). The source of, high-energy irradiation include a pulsed or continuous wave laser (14) or high-energy lamp (59).
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 24, 1993 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 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.