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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 12685972 B1

PDFFull Text
Date of Patent:
Jul. 21, 2026

Filed:

Jun. 25, 2021

Hollow fiber and a process for preparation thereof

Applicant:

E. & J. Gallo Winery, Modesto, CA (US);

Inventors:

Mehrdad Mohammadifakhr, Enschede, NL;

Antoine Kemperman, Enschede, NL;

Joris De Grooth, Enschede, NL;

Krzysztof Trzaskus, Kgs. Lyngby, DK;

Assignee:

E. & J. Gallo Winery, Modesto, CA (US);

Attorney:

Dentons US LLP

Primary Examiner:

Krishnan S Menon

Assistant Examiner:

Tak L. Chiu

Int. Cl.
CPC ...
B01D 69/08 (2006.01); B01D 61/00 (2006.01); B01D 67/00 (2006.01); B01D 69/12 (2006.01); B01D 69/14 (2006.01); B01D 71/40 (2006.01); B01D 71/60 (2006.01); B01D 71/64 (2006.01); D01D 1/06 (2006.01); D01D 5/24 (2006.01);
U.S. Cl.
CPC ...
B01D 69/088 (2013.01); B01D 61/0022 (2022.08); B01D 67/0009 (2013.01); B01D 67/00933 (2022.08); B01D 69/087 (2013.01); B01D 69/1251 (2022.08); B01D 69/14111 (2022.08); B01D 71/40 (2013.01); B01D 71/601 (2022.08); B01D 71/641 (2022.08); D01D 1/065 (2013.01); D01D 5/24 (2013.01); B01D 2323/06 (2013.01); B01D 2323/21839 (2022.08); B01D 2323/50 (2013.01); B01D 2325/34 (2013.01); D10B 2331/02 (2013.01);
Abstract

A process for preparing a hollow fiber includes the steps of providing a dope solution including polyamide imide (PAI), providing an aqueous bore solution including polyethylene imine (PEI), extruding the dope solution in an cross-sectional annular shape and ejecting the bore solution in the center of the annular shape, allowing the PAI and the PEI to react, thereby forming an internal surface layer including the cross-linked reaction product, and forming a polyamide Thin Film Composite (TFC) layer by interfacial reaction of aqueous di- or triamine compound and organic di- or triacylhalide compound on the internal surface layer including the cross-linked reaction product.

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Mohammadifakhr, Mehrdad. (2026). Hollow fiber and a process for preparation thereof (U.S. Patent No. 12685972). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12685972

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