Title:
VISUAL DIFFERENTIATION OF ADSORBENT-LOADED MEDIA
Document Type and Number:
WIPO Patent Application WO/2003/013720
Kind Code:
A1
Abstract:
There is provided a three-dimensional adsorbent particle filter having a width, depth and at least one exposed outer face. The filter comprises darkly colored adsorbent particles having an L-value of 60 or less, preferably 20 or less providing a dark contrasting background. Reflective particles are present at the outer face of the filter at levels that allow a user to visually differentiate the filter based on the contrast between the reflective particles and the dark adsorbent particles. Different reflective particle or combinations of reflective particles are used with different filters to differentiate the filters each from the other.
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Inventors:
JANISCH JASON D
SWINEHART ROBERT M
SWINEHART ROBERT M
Application Number:
PCT/US2002/020842
Publication Date:
February 20, 2003
Filing Date:
July 01, 2002
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
B01D53/04; B01J20/20; B01J20/28; D06M11/74; D06M23/08; (IPC1-7): B01J20/20; B01D53/04
Foreign References:
| US5145061A | 1992-09-08 | |||
| FR2806007A1 | 2001-09-14 | |||
| DE3815907A1 | 1988-12-08 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 017, no. 042 (C - 1020) 26 January 1993 (1993-01-26)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 03 29 March 1996 (1996-03-29)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 03 29 March 1996 (1996-03-29)
Attorney, Agent or Firm:
Bond, William J. (MN, US)
Hilleringmann, Jochen (Patent Attorney Bahnhofsvorplatz 1 Cologne, DE)
Hilleringmann, Jochen (Patent Attorney Bahnhofsvorplatz 1 Cologne, DE)
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