.alpha.-aminodicarboxylic acid derivatives, their preparation and their use
CA 1333719 C · Owner: Lenke, Dieter · Inventors: Gruenhagen, Hans-Heinrich; Rosenberg, Joerg; Lenke, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are .alpha.-aminodicarboxylic acid derivatives of the formula:, where X is C2-C6-alkylene -CH=CH- or unacetylated or, acetylated -CH2-CHOH- -CHOH-CHOH- or -CH2-CHNH2-, Y and Z are each an aliphatic hydrocarbon radical of 8 to 30 carbon atoms and n is 1 or 2, and their sodium potassium and, ammonium salts. Also disclosed in a process for the preparation of these compounds that are biodegradable of, low toxicity and useful for the preparation of emulsions microemulsions and gels. Further disclosed is the use of these compounds as carriers for drugs in the pharmaceutical field.
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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 December 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 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.
Timeline
Timeline From CIPO dates
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.