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:
Feb. 01, 2011
Filed:
May. 30, 2008
Peter Lipowicz, Midlothian, VA (US);
Shalva Gedevanishvili, Richmond, VA (US);
Lixin L. Xue, Midlothian, VA (US);
Milton E. Parrish, Midlothian, VA (US);
Vicki L. Baliga, Chesterfield, VA (US);
Peter Lipowicz, Midlothian, VA (US);
Shalva Gedevanishvili, Richmond, VA (US);
Lixin L. Xue, Midlothian, VA (US);
Milton E. Parrish, Midlothian, VA (US);
Vicki L. Baliga, Chesterfield, VA (US);
Philip Morris USA Inc., Richmond, VA (US);
Abstract
Cellulose acetate fibers can be modified to have physical imperfections and then incorporated into cigarette filter plugs as filtering materials. Cellulose acetate fiber modification can be achieved by etching with a gas phase etchant or a liquid phase etchant comprising hydrogen peroxide. Modification of cellulose acetate fibers may be performed at various stages during the manufacture of cigarette filter plugs. Furthermore, cigarette filter plugs containing modified cellulose acetate fibers can also have spaced apart slits along the length of the cigarette filter plugs.