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:
Oct. 28, 2025
Filed:
May. 06, 2022
Applicants:
Entegris, Inc., Billerica, MA (US);
Promerus, Llc, Akron, OH (US);
Inventors:
Sina Bonyadi, Billerica, MA (US);
Pushkara Rao Varanasi, Poughkeepsie, NY (US);
Zhifeng Li, Acton, MA (US);
Carrie Lynn Frazee, Bedford, MA (US);
Larry F. Rhodes, Akron, OH (US);
Leah Langsdorf, Akron, OH (US);
Assignees:
ENTEGRIS, INC., Billerica, MA (US);
PROMERUS, LLC, Akron, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 71/44 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01);
U.S. Cl.
CPC ...
B01D 71/44 (2013.01); B01D 67/0013 (2013.01); B01D 69/02 (2013.01); B01D 2325/02 (2013.01); B01D 2325/04 (2013.01);
Abstract
The disclosure provides certain porous membranes comprised of cyclic polyolefin polymers, such as poly(norbornene)s. In one embodiment, a poly(norbornene) polymer is dissolved in tetrahydrofuran, cast into a film and subjected to solvent induced phase separation to provide a porous filter membrane (i.e., film).