US 6,093,302 C1 (6104th)
ELECTROCHEMICAL SOLID PHASE SYNTHESIS
Donald D. Montgomery, Millbrae, Calif., assignor to Nanogen, Inc., San Diego, Calif.
Reexamination Request No. 90/008,259, Oct. 4, 2006.
Reexamination Certificate for Patent 6,093,302, issued Jul. 25, 2000, Appl. No. 3,075, Jan. 5, 1998.
Int. Cl. B01J 19/00; B28B 3/00; H01L 23/58; H01M 4/00; C25D 5/02 (2006.01)
U.S. Cl. 205—122
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
The patentability of claims 1-14 and 45-48 is confirmed.
Claims 15, 16, 40 and 41 are determined to be patentable as amended.
Claims 17-39 and 42-44, dependent on an amended claim, are determined to be patentable.
1. A method for electrochemical placement of a material at a specific location on a substrate, which comprises the steps of:
providing a substrate having at its surface at least one electrode that is proximate to at least one molecule bearing at least one protected chemical functional group,
placing a buffering or scavenging solution in contact with the electrode at the surface of the substrate to prevent the electrochemically generated reagents from leaving the locality of the electrode,
applying a potential to the electrode sufficient to generate electrochemical reagents capable of deprotecting at least one of the protected chemical functional groups, and
bonding the deprotected chemical functional group with a monomer of a pre-formed molecule.