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:
Aug. 17, 1976
Filed:
Feb. 07, 1975
Applicant:
Inventors:
Thomas A Myles, Township of Tonawanda, NY (US);
Curtis E Zimmer, Youngstown, NY (US);
Assignee:
The Carborundum Company, Niagara Falls, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252520 ; 252500 ; 252518 ; 252521 ; 252950 ; 252951 ; 423305 ;
Abstract
A method for the preparation of pyrophosphates such as SiP.sub.2 O.sub.7 is disclosed, whereby the undesired formation of by-products such as Si.sub.2 P.sub.2 O.sub.9 is minimized. Such pyrophosphates are particularly suitable for the formation of solid semi-conductor diffusion sources, wherein the presence of by-product is seriously detrimental.