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Expired Canadian patentCanada

Antibiotic zeolite

CA 1304345 C · Owner: Shinanen New Ceramic Corporation · Inventors: Yamamoto, Tatuo; Uchida, Masashi; Niira, Reiji

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

An antibiotic zeolite and an antibiotic resin composition containing thereof are provided. The antibiotic zeolite is prepared by replacing all or a part of ionexchangealbe ions in zeolite with ammonium ions and antibiotic metal ions such as silver, copper zinc, mercury, tin, lead, bismuth, cadmium chromium and thallium. The, antibiotic resin composition comprises the antibiotic zeolite and a resin such as polyethylene polypropylene, polyvinyl chloride and polystyrene.

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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 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 4, 1987
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304345 C
Classification (IPC)C01B39/02 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 4, 1987Patent grantedJune 30, 1992Term endedJune 30, 2009

Sources & verification

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