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:
Nov. 16, 1993
Filed:
Oct. 23, 1989
Stephen B Leighton, Maplewood, NJ (US);
Michael J Brownstein, Rockville, MD (US);
Abstract
An injection device injects small amounts of injectate into each of a plurality of cells. A first plate, which may be made from a silicon chip, includes a large number of evenly spaced cell wells, in a regular array. Each well includes a through hole in the chip. A top plate, also formed from a silicon chip, includes a plurality of injection needles, arranged in a regular array corresponding to the position of the cell wells. A suspension of cells is washed over the first plate and individual cells are retained by the individual wells. A vacuum may be applied to the cell wells through a manifold beneath the first plate, thus to retain the cells in place. Excess cells and suspension are removed by washing the plate. The second plate, including the injection needles, is positioned on the first plate so that the needles pierce the plurality of cells retained in the wells, thus simultaneously introducing the injectate into a large number of individual cells.