Orthocarbonates
CA 1287638 C · Owner: Ciba-Geigy Investments Ltd. · Inventors: Eldin, Sameer H.; Rabener, Claus W.; Flury, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Orthocarbonates, Abstract, Orthocarbonates of the formula I (I), in which R is C1-C4alkyl, x is zero 1 or 2, and A is a trivalent radical, derived from an aliphatic triol by omitting the hydroxyl groups the hy-, droxyl groups of the triol being bonded to different carbon atoms are, suitable as cocomponents in the curing of epoxy resins in that they limit the reduction in volume occurring during curing of epoxy resins. In addition, the cured resins are distinguished by increased flexural strength and impact strength.
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
- Granted August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- 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.