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:
Nov. 28, 1978
Filed:
Dec. 03, 1975
Applicant:
Inventor:
Malcolm E Washburn, Princeton, MA (US);
Assignee:
Norton Company, Worcester, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 65 ; 264 66 ;
Abstract
A new form of reaction bonded silicon nitride is described along with the process of making this new product. The product is characterized by isotropic structure, extremely fine pore and grain size, high strength and a high ratio of alpha silicon nitride to beta silicon nitride. The product has a density of at least 2.45 grams/cc and is essentially free of pores greater than 15 microns.