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. 13, 1983
Filed:
Nov. 13, 1980
Applicant:
Inventor:
Marinda L Wu, Fremont, CA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ; B02C / ;
U.S. Cl.
CPC ...
241 29 ; 241 30 ; 2411 / ; 241170 ; 241184 ; 429218 ;
Abstract
A dramatic reduction in the time required to fine-grind high borate solder glasses is achieved. In the prior art method, the glass is ball-milled in the presence of an amine for about seven days or more. It has now been discovered that by first rod-milling such glasses for a period of from about 1/2 to about 24 hours, the time required for the 'amine grind' can be shortened to a period of from about 1 to 3 days. A further improvement is that rod milling eliminates the laborious sieving procedure previously employed to ensure the absence of undesirably large particles in the feed to the amine grinding operation.