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. 04, 2003
Filed:
May. 19, 1998
Applicant:
Inventors:
Robert W. Balliett, Westborough, MA (US);
Arthur H. Bronstein, Canton, MA (US);
Thomas J. Ryan, Canton, MA (US);
Michael Greengart, Newton, MA (US);
Daniel J. Moynihan, Watertown, MA (US);
Douglas A. Ryan, Stoughton, MA (US);
Paul Queneau, Golden, CO (US);
Mark Berggren, Golden, CO (US);
Brandon Hagen, Golden, CO (US);
Assignee:
H. C. Starck, Inc., Newton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23G 2/300 ;
U.S. Cl.
CPC ...
C23G 2/300 ;
Abstract
Refractory metal pickling bath of HF/H O aqueous solution with recovery of the etched metal as a salt thereof and separation of dissolved impurities taken from the refractory metal, with avoidance of drawbacks of state of the art HF/HNO pickling solutions.