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Expired Canadian patentCanada

Temperature and humidity control system

CA 1235573 A · Owner: Jacobs, Alphonse F. · Inventors: Paxton, James R.; Jacobs, Alphonse F.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

12, Abstract, A system for controlling the temperature and humidity of an enclosure such as a museum display case continuously extracts air from the enclosure increases its, humidity, cools it to a controlled temperature at which, point its humidity is 100%. The air is then heated and returned to the enclosure. By selection of the controlled temperature the relative humidity of the returned air may be determined,

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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 April 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 17, 1986
GrantedApril 26, 1988
Term endedApril 26, 2005
Patent numberCA 1235573 A
Classification (IPC)F24F3/14 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedJuly 17, 1986Patent grantedApril 26, 1988Term endedApril 26, 2005

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.