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:
Oct. 05, 2010
Filed:
Jun. 25, 2004
Applicants:
Roberto J. Rovito, Quakertown, PA (US);
Jennifer M. Rieker, Bethlehem, PA (US);
Darryl W. Peters, Stewartsville, NJ (US);
Inventors:
Roberto J. Rovito, Quakertown, PA (US);
Jennifer M. Rieker, Bethlehem, PA (US);
Darryl W. Peters, Stewartsville, NJ (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C11D 7/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to aqueous, buffered, fluoride containing compositions having a pH of greater than 7.0 to about 11.0. In certain embodiments, the buffered compositions have an extended worklife because pH dependent attributes such as oxide and metal etch rates are stable so long as the pH remains stable.