The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1981
Filed:
Dec. 05, 1979
Applicant:
Inventor:
George M Daffern, Sunnyvale, CA (US);
Assignee:
Syva Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
356246 ; 356410 ;
Abstract
A flow cell for optical analysis of a fluid sample has a cell chamber whose volume is not limited by considerations of fluid residue carryover. A piston movable within the viewing region and having a conduit through its face is used to collapse the volume of the viewing region to substantially zero while maintaining a flow path between inlet and outlet conduits so that residue can be removed from the flow cell and its conduits with a minimum of cleaning fluid.