Process for preparing hydroxylated amines
CA 2001801 A1 · Owner: Laurenzo, Kathleen S. · Inventors: Laurenzo, Kathleen S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydroxylated primary amines corresponding to the formula:, R-X-CH2-CH(OH)-CH2NH2 (I), in which R is a saturated or unsaturated straight chain C5-C18 aliphatic radical and X represents -O- -S-, -NH- or -CH2- are prepared by reacting an epoxide of the formula:, (II), in which R and X are as defined previously and R1 and R2 together represent an epoxy radical with ammonium carbamate to form the corresponding substituted ammonium carbamate of the formula:, R-X-CH2-CH(OH)-CH2-NH-CO2- R-X-CH2-CH(OH)-CH2?NH3 (III), in which R and X are as defined previously and thereafter heating the substituted ammonium carbamate thus formed at a temperature and for a length of time sufficient to form the …
Read the whole patent
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 30, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.