Isocyanato-acylurethanes, a process for their prepration and their use
CA 1309723 C · Owner: Schafer, Walter · Inventors: Schafer, Walter; Hassel, Tillmann; Muller, Hanns P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3059, LeA 25,436, ISOCYANATO-ACYLURETHANES A PROCESS, FOR THEIR PREPARATION AND THEIR USE ABSTRACT OF THE DISCLOSURE, The present invention relates to isocyantoacylurethanes corresponding to Formula I (I), wherein, R has a valency of m+n and is a hydrocarbon group R' is a hydrocarbon group and, m and n may be identical or different and each have a, value of 1 or 2. The present invention also relates to a process for preparation of these isocyanato-acylurethanes which comprises reacting isocyanato-carboxylic acid chlorides with carbamic acid esters. Finally, the present invention is directed to the use of these isocyanato-acylurethanes as intermediate products for the production of …
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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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
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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.