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Expired Canadian patentCanada

Solid bodies containing active substances and a structure consisting of hydrophilic macromolecules, plus a method of producing such bodies

CA 2128244 C · Owner: Freidenreich, Jurgen · Inventors: Freidenreich, Jurgen; Schick, Ursula; Wunderlich, Jens-Christian

CIPO record

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Abstract From the Canadian patent

The invention relates to accurately meterable shaped articles, for example granules or pellets containing hydrophilic macromolecules, active compounds and optionally further pharmaceutically acceptable structure-forming substances and auxiliaries, the active compound being present in a matrix in dissolved suspended or, emulsified form, and a novel process for the production of these shaped articles, the process being particularly economically and ecologically acceptable and use of the, shaped articles as medicaments in which the bioavailability, shelf life and tolerability is increased. Using the shaped articles or mixtures according to the invention, intermediates or final products for …

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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

  • Filed January 18, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 18, 1993
GrantedSeptember 22, 1998
Term endedJanuary 18, 2013
Patent numberCA 2128244 C
Classification (IPC)A61K9/20 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedJan 18, 1993Patent grantedSep 22, 1998Term endedJan 18, 2013

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