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:
Jan. 29, 2002
Filed:
May. 12, 2000
Applicant:
Inventors:
Lee H. Leiner, New Kensington, PA (US);
James E. Burd, Saxonburg, PA (US);
Robert M. Gaydos, Export, PA (US);
Assignee:
Preservation Technologies LP, Cranberry Township, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 1/00 ;
U.S. Cl.
CPC ...
C09D 1/00 ;
Abstract
An improved method of deacidifying books, imaged paper and other imaged materials having a cellulose base wherein, for a sufficient time to raise the pH of the materials, the materials are treated with alkaline particles of a basic metal oxide, hydroxide or salt dispersed in a hydrofluorether carrier, alone, or in combination with a perfluorinated carrier. A surfactant is added.