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Expired Canadian patentCanada

Low pressure-drop catalytic mat and method of preparing the same

CA 1189500 A · Owner: Prototech Company · Inventors: Petrow, Henry G.

CIPO record

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Abstract From the Canadian patent

Abstract of Disclosure, This disclosure is concerned with a novel limp, low-pressure-drop catalytic mat particularly adapted for use in ignitible gasflow systems, such as heated hair curlers and the like, comprising in preferred form a loosely packed quartz fiber mat to the fibers of which have been adhered oxide particles as of alumina and the like, coated with platinum catalytic particles, without, however, impairing the limpness, looseness and flexibility of the mat.

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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 June 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 20, 1982
GrantedJune 25, 1985
Term endedJune 25, 2002
Patent numberCA 1189500 A
Classification (IPC)B01J35/06 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 20, 1982Patent grantedJune 25, 1985Term endedJune 25, 2002

Sources & verification

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