Preparation of o-substituted hydroxylamine hydrochlorides
CA 1296022 C · Owner: Schaefer, Peter · Inventors: Faust, Tillmann; Will, Wolfgang; Schaefer, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O-substituted hydroxylamine hydrochlorides I, R-O-NH2 . HCl (I), where R is C1-C4-alkyl C3- or C4-alkenyl, C3- or C4-, haloalkenyl or benzyl are prepared by continuous hydroly-, sis of the corresponding acetoxime ethers II (II), in a reaction column containing from 20 to 60 theoretical plates with constant removal of the acetone eliminated using hydrogen chloride and water.
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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 February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
- 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.