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. 23, 1993
Filed:
Nov. 15, 1990
Applicant:
Inventors:
Frederick C Hahn, Aloha, OR (US);
Andrew H Ulven, Silverton, OR (US);
James W Huiras, Canby, OR (US);
Assignee:
ESCO Corporation, Portland, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D / ; C21D / ;
U.S. Cl.
CPC ...
148593 ; 148594 ; 148654 ; 72324 ; 72370 ; 761011 ; 76109 ; 294001 ; 29891 ; 3714 / ;
Abstract
A method of making a tooth point and product wherein a tubular blank of alloy steel is heated, shaped at one end to provide a box section and shaped at the other end to provide a blade made up of two layers of steel forged together.