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. 09, 1977
Filed:
Aug. 16, 1976
Applicant:
Inventor:
Homer M Wilson, Houston, TX (US);
Assignee:
Petrolite Corporation, St. Louis, MO (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
2041 / ;
Abstract
An improvement to an automatic correcting type of corrosion ratemeter (e.g., U.S. Pat. No. 3,717,566) with test specimen, reference and third electrodes in contact with corrodant and 'null' and 'measurement' circuitry whereby correcting is made for freely corroding potential and addition of reference polarization potential between the test and reference electrodes in conjunction with controlled current flow between the test and third electrodes. The improvement comprises unique circuitry for common base, steady state readouts eliminating asynchronous cycle time problems and providing precise simultaneous readout(s) calibration.