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. 06, 1976
Filed:
Sep. 10, 1973
Applicant:
Inventors:
James O Knobloch, Naperville, IL (US);
James P Nelson, Woodridge, IL (US);
John B Harkness, Naperville, IL (US);
Assignee:
Standard Oil Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260525 ;
Abstract
Isolation of polyhalobenzenepolycarboxylic acids from a sulfuric acid medium by diluting said sulfuric acid medium with liquid sulfur dioxide and partitioning said polyhalobenzenepolycarboxylic acids from said sulfuric acid medium.