Liquid measurement cell having a transparent partition therein

Details Liquid measurement cell having a transparent partition therein Liquid measurement cell having a transparent partition therein

2006-12-05

2008-09-09

Chowdhury, Tarifur R (Department: 2886)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

C356S246000

Reexamination Certificate

active

07423755

ABSTRACT:
A flow cell for measuring the color properties of a liquid flowing through the flow cell using interrogating radiation at a predetermined wavelength has a thin partition mounted in spaced relationship between both a window and a base of the cell. The partition has a predetermined index of refraction and has a thickness dimension that is less than that of the window. The spacing between the partition and the window is such that evanescent coupling of radiation reflected from the liquid into the material of the window is prevented. Typically, this spacing is a distance not less than three (3) times the predetermined maximum wavelength in the wavelength range of interrogating radiation. A plurality of spacer elements may be disposed in the air cavity to maintain the spaced relationship between the partition and the window. The flow cell has a liquid supply passage and a liquid removal passage formed therein. The liquid supply passage, the sample chamber and the liquid removal passage cooperate to define a liquid flow path through the flow cell. The liquid supply passage, the sample chamber and the liquid removal passage are configured such that any cross section taken in a plane substantially perpendicular to the liquid flow path at any location therealong exhibits substantially the same cross-sectional area.

REFERENCES:
patent: 3628867 (1971-12-01), Brady
patent: 3690771 (1972-09-01), Armstrong et al.
patent: 4403866 (1983-09-01), Falcoff et al.
patent: 4652745 (1987-03-01), Zanardelli
patent: 4707134 (1987-11-01), McLachlan et al.
patent: 4714345 (1987-12-01), Schrader
patent: 4816670 (1989-03-01), Kitamura et al.
patent: 4867559 (1989-09-01), Bach
patent: 4887217 (1989-12-01), Sherman et al.
patent: 4936685 (1990-06-01), Taylor et al.
patent: 5194915 (1993-03-01), Gilby
patent: 5223142 (1993-06-01), Kollbert
patent: 5777726 (1998-07-01), Krone-Schmidt
patent: 5811793 (1998-09-01), Pientka
patent: 5963332 (1999-10-01), Feldmann et al.
patent: 6032341 (2000-03-01), Cain et al.
patent: 6188474 (2001-02-01), Dussault et al.
patent: 6223142 (2001-04-01), Bargh et al.
patent: 6535283 (2003-03-01), Heffels et al.
patent: 6867861 (2005-03-01), Martino et al.
patent: 2002/0149773 (2002-10-01), Martino et al.
patent: 2004/0190367 (2004-09-01), Wierzbicki et al.
patent: 2005/0174561 (2005-08-01), Murakami et al.
patent: 2005/0266582 (2005-12-01), Modin et al.
patent: 2006/0043301 (2006-03-01), Mantele et al.
patent: 2007/0131018 (2007-06-01), Alspach et al.
patent: 2007/0132991 (2007-06-01), Alspach et al.
patent: 100 50 416 (2002-04-01), None
patent: 103 52 924 (2005-07-01), None
patent: 584654 (1994-03-01), None
patent: 1589705 (1981-05-01), None
patent: 2228083 (1990-08-01), None
patent: 2000 193586 (2000-07-01), None
patent: WO 2005 / 062022 (1993-11-01), None
patent: WO 99 / 41003 (1999-08-01), None
patent: WO 99 / 48602 (1999-09-01), None
patent: WO 01 / 63248 (2001-08-01), None
Yang et al. “a-Cyclodextrin . . . ” Analytica Acta 537 (2005) 385-392.
Yokoyama “Simple System . . . ” Review of Scientific Instr., 64 (1993) 1369-70.

Affiliated with

Also associated with

Rating

Liquid measurement cell having a transparent partition therein does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid measurement cell having a transparent partition therein, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid measurement cell having a transparent partition therein will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3979963