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. 08, 1979
Filed:
Apr. 20, 1977
Applicant:
Inventors:
Hideo Sawada, Sakai, JP;
Junji Kawamoto, Sakai, JP;
Assignee:
Daicel Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24D / ; A24B / ;
U.S. Cl.
CPC ...
131267 ; 106183 ; 560174 ;
Abstract
Cigarette filters are prepared by blooming a tow of cellulose acetate fibers, adding or spraying onto the bloomed tow from 1 to 20% by weight (based on the weight of the cellulose acetate fibers) of a plasticizer composed solely of, or comprising as one ingredient, at least one levulinic acid ester, and gathering the thus-treated bloomed tow to form a cigarette filter rod.