Title:
Portable colorimeter
United States Patent D336444
US Patent References:
Colorimeter
Sierra et al. - July, 1991 - D318245

Colorimeter
Sierra et al. - November, 1991 - D321488

Photometer with interchangeable calibration cards
Bodart - May, 1981 - 4266877

Spectrophotometer for measuring absorption characteristics of a complex lens
Ace - October, 1985 - 4549081

Optical density detector
Yamanishi et al. - January, 1991 - 4986665


Inventors:
Anderson, Mark E. (Loveland, CO)
Cooper, Richard J. (Loveland, CO)
Stream, Robert D. (Loveland, CO)
Application Number:
D/482687
Publication Date:
06/15/1993
Filing Date:
02/21/1990
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Assignee:
Hach Company (Loveland, CO)
Primary Class:
D10/81
Other Classes:
D18/50
Field of Search:
D10/78, D10/81, D10/46, D24/216, D24/231, D24/232, 356/402-411, 356/244, 356/412-422, 356/432-435
US Patent References:
5013155Portable spectrophotometric instrument having vial holder and light integratorJanuary, 1991Rybak356/408
5037614Chemical level measurement device with easy action cover and single control mode selection capabilityAugust, 1991Makita et al.356/402
5083868ColorimeterJanuary, 1992AndersonD10/81
Primary Examiner:
Douglas, Alan P.
Assistant Examiner:
Davis, Antoine D.
Attorney, Agent or Firm:
Edmundson, Dean P.
Claims:
1. The ornamental design for a portable colorimeter, as shown.

Description:

FIG. 1 is a perspective view of a colorimeter showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.