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:
May. 24, 1977
Filed:
Jan. 30, 1975
Applicant:
Inventors:
Ralph Waldo Emerson, Boston, MA (US);
John R Shattuck, Cumberland Foreside, ME (US);
Assignee:
Plasmine Corporation, Portland, ME (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
106218 ; 106219 ; 106236 ; 260102 ;
Abstract
This invention is directed to novel sizing agent compositions containing urea which is chemically modified and/or combined with other materials which produce desirable sizing properties. These novel agents are used as beater additives in pulp refining for the manufacture of cellulosic products or are applied to finished cellulosic products as surface sizes. The invention is also directed to methods of making the sizing agents. In one preferred embodiment, urea is reacted with sulfamic acid and the resulting reaction product is combined with rosin and further reacted to produce a novel sizing agent.