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:
Jan. 06, 1976
Filed:
Feb. 01, 1974
Applicant:
Inventors:
Jurgen Cramer, Frankfurt am Main, DT;
Hartmuth Wilhelm Alt, deceased, LATE OF Munich, DT;
by Ortwin Alt, heir, Straubing, DT;
by Gudrun Beyer, nee Alt, heir, Hohensachsen, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ; C25B / ; C25B / ;
U.S. Cl.
CPC ...
204 74 ; 204 72 ; 204294 ;
Abstract
A process for the manufacture of phenylhydrazine by cathodic reduction of diazoaminobenzene dissolved in an electrolyte on solid electrodes with separation of cathode and anode spaces by a diaphragm wherein the diazoaminobenzene solution is electrolyzed in a flow type diaphragm cell at a graphite cathode having a three dimensional surface.