5-HALO-4H-1,3-DIOXIN-4-ONE COMPOUNDS, .alpha.-HALO- ACETOACETIC ESTERS PREPARED FROM SUCH COMPOUNDS AND PROCESS FOR THEIR PREPARATION
CA 1234125 A · Owner: Eastman Kodak Company · Inventors: Clemens, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
5-Halo-4H-1,3-Dioxin-4-One Compound, .alpha.-Halo- Acetoacetic Esters Prepared from Such Compounds and Process for their Preparation, Abstract Disclosed are 5-halo-4H-1,3-dioxin-4-ones and their preparation by treating a compound having the formula, with X2 or SO2X2 wherein X is Cl or Br. The 5-halo-4H-1,3-dioxin-4-ones can then be reacted with an alkali metal alkoxide at a temperature of about -40°C. to about 50°C. to provide an .alpha.-haloacetoacetic ester.
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 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 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.