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Expired Canadian patentCanada

Compositions that affect suppression of cutaneous delayed hypersensitivity and products including same

CA 1320445 C · Owner: Ross, Peter M. · Inventors: Ross, Peter M.; Bradlow, H. Leon

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

Glucocorticoid carboxylic acid esters and topical compositions thereof are utilized in methods for modulating cutaneous delayed hypersensitivity. Formulations of the glucocorticoid carboxylic acid esters are disclosed including incorporation into percutaneous drug delivery devices.

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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 July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
  • 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 20, 1988
GrantedJuly 20, 1993
Term endedJuly 20, 2010
Patent numberCA 1320445 C
Classification (IPC)A61K31/58 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMay 20, 1988Patent grantedJuly 20, 1993Term endedJuly 20, 2010

Sources & verification

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