Process of producing n-formylaspartic anhydride
CA 1234389 A · Owner: Ajinomoto Co. Inc. · Inventors: Yukawa, Toshihide; Nakamura, Masao; Takeda, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N-formylaspartic anhydride is produced by grinding solid aspartic acid into fine particles whereby, the particles have a size of 75 µm or less and reacting, the particles with formic acid and acetic anhydride the amount of formic acid ranging from 1 to 1.5 moles and the amount of acetic anhydride ranging from 2 to 2.5 moles, each per mole of aspartic acid. According to the process of the present invention N-formylaspartic, acid can be produced in high yields using a small amount of formic acid in a short period of time.
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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 March 22, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 22, 2005.
- 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.