Ronald A Erickson

US Patent:

8152902, Apr 10, 2012

Filed:

Sep 30, 2009

Appl. No.:

12/570683

Inventors:

Willard E. Wood - Arden Hills MN, US
Ronald A. Erickson - Edina MN, US

Assignee:

Cellresin Technologies, LLC - St. Paul MN

International Classification:

B01D 53/04
C08L 23/02

US Classification:

95144, 96148, 96154, 502407, 2065244

Abstract:

The invention relates to compositions that can be used to adsorb low concentration, preferably, for example less than 15 ppm, of unwanted or target substances. Typically the absorbance can be from an enclosed vapor phase. Such absorbency is accomplished in a contained substantially enclosed gaseous volume or atmosphere using a composition comprising a cyclodextrin compound and a polyethylenimine that can have an absorbency capability for low concentrations of unwanted or target substances. Such absorbency can be obtained with thermoplastic materials used in the form of bulk polymer or a film, fiber, web, woven fabric, nonwoven fabric, sheet, packaging and other such structures including or surrounding the enclosed volume. The adsorbent of the invention is typically used in the context of an enclosed volume, also known as an enclosed ambient vapor phase that contains the adsorbent of the invention and the unwanted or target substances at a concentration that is not desirable. The concentration should be reduced to non-offensive sensed limits or a limit that does not produce a biological response.

US Patent:

50975692, Mar 24, 1992

Filed:

Jun 19, 1990

Appl. No.:

7/540223

Inventors:

Ronald A. Erickson - Brooklyn Park MN

International Classification:

A41D 2510

US Classification:

24 49R

Abstract:

The tie back tack is used to secure a four-in-hand necktie to a shirt with minimal lateral movement of the necktie and without puncturing the front pendant of the necktie. A four link chain extends from the tie back tack and is attached to a removable clasp. The removable clasp attaches to the front edge of the shirt and keeps the necktie not only in place but centered at all times.