Constant boiling ternary compositions
CA 1073609 A · Owner: Allied Chemical Corporation · Inventors: Taub, Bernard; Ostrozynski, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Constant boiling and essentially constant boiling compositions comprising from about 99-72 weight percent trichlorofluoromethane, from about 0.5-15 weight percent isopentane and from about 0.5-13 weight percent methylene chloride are novel compositions which are particularly useful as blowing agents in the preparation of polyurethane foams.
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 March 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 1997.
- 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.