Halogen generator
CA 2064198 C · Owner: Mcgrady, Gerard Sean · Inventors: Mcgrady, Gerard Sean; Webb, Colin Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A halogen generator which uses a material which absorbs commercially available halogen and, on being heated, releases the halogen in a very pure form, i.e. > 99.7 %. Such a generator can be used in a gas management system for an excimer laser in which the laser gas contains a halogen donor an active rare gas and an inert , gas diluent. Cleaners are provided to enable the removal from the laser gas mixture of contaminants which build up in operation of the laser and the halogen gas generator is provided to replace halogen lost in the contaminants and elsewhere. The generator can be operated even when the laser is in operation so that a desired partial pressure of the halogen can be …
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 May 21, 1991 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2013.
- 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.