Organo-soluble c.sub.3-c.sub.4 hydroxyalkyl ethyl cellulose ethers
CA 1236453 A · Owner: The Dow Chemical Company · Inventors: Garner, Joseph L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
C3-C4 hydroxyalkyl ethylcellulose ethers which are substantially soluble in toluene and toluene, and heptane mixtures are disclosed. Such organo-soluble cellulose ethers are useful in thickening organic solvent systems comprised of toluene. A process for the preparation of the ethers is also provided.
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 May 10, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 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.
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.