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Expired Canadian patentCanada

Chambers for housing animals in toxycology laboratories

CA 1087468 A · Owner: E. Gowrie Limited · Inventors: Gowrie, Eric

CIPO record

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

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Abstract From the Canadian patent

IMPROVEMENTS IN CHAMBERS FOR HOUSING, ANIMALS IN TOXYCOLOGY LABORATORIES ABSTRACT OF THE DISCLOSURE, AN inhalation chamber for housing animals in toxycology laboratories in which each animal cage slowly in the casing to bring each cage in turn below a controlled atmosphere inlet and maintaining the pressure in the chamber below atmospheric pressure to avoid leakage to atmosphere with a, scraper and water supply for removing droppings from a tray below each cage.

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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 12, 1978
GrantedOctober 14, 1980
Term endedOctober 14, 1997
Patent numberCA 1087468 A
Classification (IPC)A01K1/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 12, 1978Patent grantedOct 14, 1980Term endedOct 14, 1997

Sources & verification

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