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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.:

US 4143072 B1

PDFFull Text
Date of Patent:
Mar. 06, 1979

Filed:

Apr. 27, 1978

Process for the purification of polyethers using a tubular coil

Applicant:
Inventors:

Hartmut Hetzel, Cologne, DE;

Pramod Gupta, Bedburg, DE;

Hans-Joachim Sandhagen, Dormagen, DE;

Assignee:

Bayer Aktiengesellschaft, Leverkusen, DE;

Attorneys:

Harsh; Gene

Gil; Joseph C.

Primary Examiner:

Harold D Anderson

Assistant Examiner:

E A Nielsen

Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260573 ; 528417 ; 528419 ; 528421 ; 2605 / ; 536120 ; 568607 ; 568608 ; 568609 ; 568613 ; 568618 ; 568620 ;
Abstract

This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.

Find Patent Forward Citations

Hetzel, Hartmut. (1979). Process for the purification of polyethers using a tubular coil (U.S. Patent No. 4143072). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4143072

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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