Corazon Cris Brizuela

US Patent:

56162464, Apr 1, 1997

Filed:

Jun 1, 1995

Appl. No.:

8/456583

Inventors:

David R. Gagnon - St. Paul MN
Harlan L. Krinke - May Township, Washington County MN
Corazon C. Brizuela - Woodbury MN

Assignee:

Minnestoa Mining & Manufacturing Company - St. Paul MN

International Classification:

B01D 7138

US Classification:

210490

Abstract:

Articles having a complex geometric configuration have hydrophilicity imparted to at least a portion of surfaces of the articles while substantially retaining the complex geometric configuration. The hydrophilicity is imparted by an extremely thin, self-interlocking shell of tactic, hydrophilic poly(vinyl alcohol) enveloping the surfaces. A tactic poly(vinyl alcohol) precursor applied to surfaces of the supporting structure is reacted in situ on the surfaces with a hydrolysis reagent to prepare the tactic, hydrophilic poly(vinyl alcohol) shell. The article having the hydrophilic shell is highly resistant to solvent washout. Hydrophilicity and hydrophobicity can be reversibly provided on regio-specific surfaces of the article. Articles in the form of membranes useful as residue barriers for electroplating devices, and separators for electrochemical cells are also described.

US Patent:

55774946, Nov 26, 1996

Filed:

Aug 10, 1994

Appl. No.:

8/288874

Inventors:

Maurice H. Kuypers - Oakdale MN
Corazon C. Brizuela - Woodbury MN
Lawrence W. Craighead - Mendota Heights MN
David P. Swanson - Woodbury MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

A62B 1808

US Classification:

12820113

Abstract:

A heat and moisture exchange media and device is provided from structural matrix fibers and superabsorbent fibers.