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:
Feb. 22, 1977
Filed:
Apr. 07, 1976
Maurice P Roach, Waterloo, IA (US);
Ann E Schoenjahn, Waterloo, IA (US);
Larry G Carmack, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A new, accurate method for the determination of percent total carbon in a molten hypoeutectic or hypereutectic iron is disclosed. It has been found that percent total carbon content of a molten iron is related to a straight-line function of the difference in liquidus and eutectoid transformation (i.e., austenite to pearlite) temperatures of the iron. A standard liquidus - eutectoid transformation temperature difference (based on total carbon content) is generated. A molten iron sample is cooled through the eutectoid transformation temperature and the difference in the liquidus and eutectoid transformation temperatures is compared with the standard liquidus-eutectoid transformation temperature difference to determine the percent total carbon of the sample.