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:
Apr. 13, 1993
Filed:
Apr. 20, 1992
Applicant:
Inventor:
Carole L Elias, Allegheny County, PA (US);
Assignee:
Aristech Chemical Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568559 ; 568576 ;
Abstract
Undesirable color change in freshly manufactured cumene hydroperoxide is inhibited by treatment comprising adding sodium hydroxide in an effective amount up to about 120 ppm and holding the treated cumene hydroperoxide at a temperature of about 50.degree. C. to about 70.degree. C. for 0.5 to two hours; optionally the cumene hydroperoxide so treated in the higher end of this caustic range is further treated with a wiped-film evaporator.
Elias, Carole. (1993). Inhibiting color change in cumene hydroperoxide (U.S. Patent No. 5202498). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5202498
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