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Expired Canadian patentCanada

Enzyme controlled release system and organic conjugate reactant

CA 1302252 C · Owner: Meneghini, Frank A. · Inventors: Palumbo, Paul S.; Arnost, Michael J.; Meneghini, Frank A.

CIPO record

Overview

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

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Abstract From the Canadian patent

The present invention provides an enzyme controlled release system and prepared reactant by which an identifiable molecule may be released on demand through the action of an active enzyme. The controlled release system is useful for detection of an analyte of interest present in a test sample in picogram per liter quantities and may be employed in a variety of different modes of use including immunoassays, enzyme amplification systems and the release of pharmacologically active ligands.

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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 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.
FiledNovember 3, 1987
GrantedJune 2, 1992
Term endedJune 2, 2009
Patent numberCA 1302252 C
Classification (IPC)G01N33/54 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 3, 1987Patent grantedJune 2, 1992Term endedJune 2, 2009

Sources & verification

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