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:
Sep. 17, 1991
Filed:
Oct. 16, 1990
Applicant:
Inventor:
Steve S Hahn, Wellesley Hills, MA (US);
Assignee:
The Gillette Company, Boston, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B26B / ;
U.S. Cl.
CPC ...
3034654 ; 761041 ; 76DI / ;
Abstract
A process for forming a razor blade includes the steps of providing a ceramic substrate, mechanically abrading an edge of the ceramic substrate to form a sharpened edge thereon with facets that have an included angle of less than thirty degrees; thermally processing the mechanically abraded edge to reduce surface raggedness and subsurface defects; and sputter-sharpening the sharpened edge to provide supplemental facets that have an included angle of more than forty degrees and define a tip radius of less than five hundred angstroms. The resulting blade exhibit excellent shaving properties.