Refrigerator
CA 1111666 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Asselman, George A.A.; Van Mensvoort, Adrianus J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Refrigerator". The invention relates to a refrigerating device with a primary and a secondary refrigerating system which, are in heat exchanging contact with each other. The secondary refrigerating system is connected to a reservoir containing a control gas getter which can be heated for varying the amount of free control gas in the secondary refrigerating system, so as to control the temperature of the secondary refrigerating system. It is proposed to close the reservoir with a breakable seal, so that a getter container in the form of a cartridge is obtained. After the cartridge has been mounted on the secondary refrigerating system the breakable seal is ruptured by raising the pressure.
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
- Granted November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.