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Expired Canadian patentCanada

Method for stably binding antigens and allergens to solid supports and supports employed

CA 1235658 A · Owner: Laboratorio Farmaceutico Lofarma S.A.S. · Inventors: Falagiani, Paolo; Brenna, Oreste V.

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Abstract From the Canadian patent

A method for stably binding antigens and allergens to a polystyrene support, which consists In reacting a polyfunctional aldehyde with the polystyrene solid phase; In washing said solid pahse to remove the excess aldehyde; In incubating the so processed solid phase with the antigens or the allergens and in sta-, bilizing the aldehyde-antigens or the aldehyde-allergens bond with sodium borohydrlde or with sodium cyanoborohydride.

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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.
FiledMay 2, 1984
GrantedApril 26, 1988
Term endedApril 26, 2005
Patent numberCA 1235658 A
Classification (IPC)G01N33/54 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 2, 1984Patent grantedApril 26, 1988Term endedApril 26, 2005

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