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Expired Canadian patentCanada

Tumour-inhibiting saccharide conjugates

CA 2001129 C · Owner: Wiessler, Manfred · Inventors: Dickes, Michael; Wiessler, Manfred

CIPO record

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Abstract From the Canadian patent

The invention relates to a method for the preparation of glyco-conjugates of phosphorus amides with the general formula (See formula 1), where the connection of the sugar with the phosphorus amide-lost residue, and the ifosfamide-lost residue resp. occurs, preferably in the 1-position and where R1 and R2, which can be, the same or different denote hydrogen, lower C1-C4 alkyl or C1-C6 haloalkyl and where as sugar there can be present monodi-, or polysaccharides in all existing isomeric and enantiomeric forms, wherein in a known way protected bromium sugars are conjugated with the respective phosphorus compounds and freed of, the protective residues, and to the use of said compounds as …

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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 October 20, 1989 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2009.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 20, 1989
GrantedJune 27, 2000
Term endedOctober 20, 2009
Patent numberCA 2001129 C
Classification (IPC)C07H11/04 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedOct 20, 1989Patent grantedJune 27, 2000Term endedOct 20, 2009

Sources & verification

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