The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 1977
Filed:
Mar. 15, 1976
Applicant:
Inventors:
Charles S Cope, Parkersburg, WV (US);
Maurice J Couture, Parkersburg, WV (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
210616 ; 260653 ;
Abstract
A process for removing the vapors of certain fluoro(alkyl vinyl ethers) from a mixture with the vapor of tetrafluoroethylene by contacting the mixture of vapors with a chilled aqueous liquid coolant solution that is substantially immiscible with the ethers. The process provides an advantageous method for recovering the fluoro(alkyl vinyl ether) monomer remaining in the polymerization kettle after it has been copolymerized with tetrafluoroethylene.