Glucoheptonate compositions and methods
CA 2175593 C · Owner: Henkel Corporation · Inventors: Grauer, Zvi; Villa, Jose L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions and methods relating to cementitious compositions are provided. The use of a glucoheptonate in the alpha form to prolong the workability of cementitious compositions is provided. The alpha form of glucoheptonate found to have properties superior to the beta form when used to retard the hydration of cementitious compositions) can be used in combination with a plasticizing resin. e.g. a naphthalenesulfonate/formaldehyde condensate resin to prolong the workability of a cememtitious composition. without unacceptably delaying green strength development Also provided are mixtures of a glucoheptonate in the alpha form and a naphthalenesulfonate/formaldehyde condensate resin …
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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
- Filed October 31, 1994 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2016.
- 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.