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:
Mar. 15, 2016
Filed:
Mar. 30, 2010
Fuming B. LI, Woodbury, MN (US);
John M. Sebastian, Oakdale, MN (US);
Marvin E. Jones, Grant, MN (US);
John M. Brandner, St. Paul, MN (US);
David A. Olson, St. Paul, MN (US);
Justin L. Keough, Vadnais Heights, MN (US);
Fuming B. Li, Woodbury, MN (US);
John M. Sebastian, Oakdale, MN (US);
Marvin E. Jones, Grant, MN (US);
John M. Brandner, St. Paul, MN (US);
David A. Olson, St. Paul, MN (US);
Justin L. Keough, Vadnais Heights, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Methods of preparing polymeric webs include hot melt blending of thermoplastic resins and processing aids. The process aids include hindered amine N-substituted succinimide oligomers. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media. Among the polymeric webs produced are electret webs. The processing aids also function as charge-enhancing additives for the electret webs.