Aminated complex-type sugar chain derivatives and process for the production thereof
CA 2533849 C · Owner: Kajihara, Yasuhiro · Inventors: Kajihara, Yasuhiro; Fukae, Kazuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aminated complex-type oligosaccharide derivative for , example, of the formula (1), (see formula 1) wherein R1 is -NH- (CO) -CH2X, -NH- (CO) -(CH2)b-CH2X isocyanate group, -NH-(CO)a-(CH2)b-CO2H or -NH-(CO)a-(CH2)b-CHO X being a halogen atom, a being 0 or 1 b being an integer of 1 to 4, R2 and R3 are a hydrogen atom or a group of the formulae (2) to (5) and may be the same or different, except for the case where both R2 and R3 are hydrogen or the formula (5), and the case where one of R2 and R3 is a hydrogen atom, with the formula (5) serving as the other thereof.
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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 July 27, 2004 and granted July 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.