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Expired Canadian patentCanada

Storage stable oligourethanes which are self cross- linking at elevated temperature or can be cross- linked with organic polyisocyanates, a process for their preparation and their use as binders or binder components

CA 1234828 A · Owner: Bayer Aktiengesellschaft · Inventors: Potter, Terry; Noll, Klaus; Pedain, Josef

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Abstract From the Canadian patent

Mo-2646, LeA 22,876, STORAGE STABLE OLIGOURETHANES WHICH ARE SELF CROSS-LINKING AT ELEVATED TEMPERATURE OR CAN BE CROSS-LINKED WITH ORGANIC POLYISOCYANATES A PROCESS FOR THEIR PREPARATION AND THEIR USE AS BINDERS OR BINDER COMPONENTS, ABSTRACT OF THE DISCLOSURE The present invention is directed to oligourethanes which are stable in storage at room temperature and either self cross-linking at elevated temperatures or capable of being cross-linked with organic polyisocyanates which may have at least partially masked isocyanate groups, a) containing about 0.1 to 3% by weight of tertiary amine nitrogen atoms in the form of structural units corresponding to the following formula attached through …

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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 April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 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.
FiledFebruary 15, 1985
GrantedApril 5, 1988
Term endedApril 5, 2005
Patent numberCA 1234828 A
Classification (IPC)C08K5/16 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedFeb 15, 1985Patent grantedApril 5, 1988Term endedApril 5, 2005

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.