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.:

US 8343273 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 01, 2013

Filed:

Mar. 30, 2012
Applicants:

Dennis M. Lettkeman, Watonga, OK (US);

Raymond A. Kaligian, Ii, Geneva, IL (US);

Michael L. Cloud, Canton, OK (US);

John W. Wilson, Fairview, OK (US);

Inventors:

Dennis M. Lettkeman, Watonga, OK (US);

Raymond A. Kaligian, II, Geneva, IL (US);

Michael L. Cloud, Canton, OK (US);

John W. Wilson, Fairview, OK (US);

Assignee:

United States Gypsum Company, Chicago, IL (US);

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method for preparing a modified beta-stucco from calcined natural rock gypsum that includes preparing a solution of liquid diethylene-triamine-pentaacetic acid in water, applying the solution onto beta-stucco while hot from the calciner, forming a wetted beta-stucco, and allowing the wetted stucco to dry and heal, forming the modified beta-stucco.


Find Patent Forward Citations

Lettkeman, Dennis. (2013). Method of modifying beta stucco using diethylene-triamine-pentaacetic acid (U.S. Patent No. 8343273). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8343273

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