Combination cryopump/getter pump and method for regenerating same
CA 2250453 A1 · Owner: Lorimer, D'Arcy H. · Inventors: Lorimer, D'Arcy H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combination cryopump/getter pump (50) including a cryopump section (52) having a cryopump inlet (76), a getter pump section (54) having a getter pump inlet (86), and a mechanism (60) for coupling the cryopump section (52) and the getter pump section (54) to a single port (58) of a process chamber to be evacuated. Preferably, a cylindrical getter pump section (54) surrounds a cylindrical cryopump section (52). Preferably the cryopump section (52) and , the getter pump section (54) are coupled to the common port (58) of the process chamber by a gate valve mechanism (60). In one embodiment the gate , valve mechanism (60) isolates the cryopump inlet (76) and the getter pump inlet (86) …
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 25, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2019.
- 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.