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. 27, 1998
Filed:
May. 05, 1995
Applicant:
Inventors:
Stephen C Buckner, St. Ann., MO (US);
Thaddeus J Podgajny, Edwardsville, IL (US);
Matthew M Thomas, Madison, IL (US);
Assignee:
McDonnell Douglas Corporation, St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01C / ;
U.S. Cl.
CPC ...
338217 ; 296101 ; 29620 ; 328307 ; 216 16 ;
Abstract
A method for producing a desired resistive taper under computer control for controlling the surface resistivity of an electrical element, which comprises the steps of creating a computer controlled optically graded pattern corresponding to the desired resistive taper, producing a phototool from the graded pattern and using the phototool to photochemically etch the graded pattern onto a substrate.