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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.:

US 12552914 B1

PDFFull Text
Date of Patent:
Feb. 17, 2026

Filed:

Jan. 19, 2021

Substituted thiolate salt melt additives

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Fuming B. Li, Woodbury, MN (US);

Duane D. Fansler, Dresser, WI (US);

Anthony F. Schultz, Forest Lake, MN (US);

John M. Brandner, St. Paul, MN (US);

Nathan E. Schultz, Woodbury, MN (US);

John M. Sebastian, Oakdale, MN (US);

Assignee:

3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);

Attorney:

Jeffrey M. Olofson

Primary Examiner:

Doris L Lee

Int. Cl.
CPC ...
C08K 5/46 (2006.01); B01D 39/16 (2006.01); C07D 249/12 (2006.01); C07D 271/113 (2006.01); C07D 285/125 (2006.01); C08K 5/378 (2006.01); D01D 5/098 (2006.01); D01F 1/09 (2006.01); D01F 6/06 (2006.01); D04H 1/4291 (2012.01); D04H 1/56 (2006.01); D04H 3/007 (2012.01); D04H 3/14 (2012.01); D06M 10/02 (2006.01); A62B 23/02 (2006.01); D06M 101/20 (2006.01); H04R 19/01 (2006.01);
U.S. Cl.
CPC ...
C08K 5/46 (2013.01); B01D 39/1623 (2013.01); C07D 249/12 (2013.01); C07D 271/113 (2013.01); C07D 285/125 (2013.01); C08K 5/378 (2013.01); D01D 5/0985 (2013.01); D01F 1/09 (2013.01); D01F 6/06 (2013.01); D04H 1/4291 (2013.01); D04H 1/56 (2013.01); D04H 3/007 (2013.01); D04H 3/14 (2013.01); D06M 10/02 (2013.01); A62B 23/02 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/1233 (2013.01); D06M 2101/20 (2013.01); D10B 2321/022 (2013.01); D10B 2505/04 (2013.01); H04R 19/013 (2013.01); H04R 19/016 (2013.01);
Abstract

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiolate salts. The heterocyclic thiolate salt has 2 nitrogen groups and a third group that may be an NH, N—NH, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

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