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:
May. 11, 1993
Filed:
Mar. 20, 1991
Applicant:
Inventor:
Richard H Goodwin, Jr, Bethesda, MD (US);
Assignee:
Neuro Probe, Inc., Cabin John, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C12Q / ; C12Q / ; C12M / ;
U.S. Cl.
CPC ...
435 29 ; 435 30 ; 435284 ; 435291 ; 435310 ; 435311 ;
Abstract
A simple chemotactic apparatus and method wherein surface tension is used to hold cell suspensions, chemotactic factors, and control fluids in place on membrane filters. In some embodiments, chemotaxis factors and controls are placed on one side of a membrane filter, and cell suspensions are placed on the other. Gravitational flow is limited by the effect of surface tension on the fluids. In some of the preferred embodiments, grids, sheets, or occluding materials are used to further limit the gravitational fluid flow.