Robert J Fleming

US Patent:

44550391, Jun 19, 1984

Filed:

Jun 24, 1982

Appl. No.:

6/391690

Inventors:

Edward H. Weitzen - Lawrence NY
Salvatore F. D'Amato - Floral Park NY
Robert M. Fleming - Weston MA
Manfred R. Kuehnle - New London NH
C. Frederick Ekman - Harvard MA
Jurgen Kruse - Branford CT
Harold J. Weber - Sherborn MA

Assignee:

Coulter Systems Corporation - Bedford MA

International Classification:

B42D 1500

US Classification:

283 83

Abstract:

Documents are encoded with at least one thin, transparent coating, normally invisible, but having a readily detectable physical characteristic such as, electrical conductivity, electrical impedance, electrical capacitance, electroluminescence. Each document consists of a substrate on which is applied (1) at least one of the thin coatings, and (2) conventional printing, preferably intaglio. The thin coating may be applied before or after the printing. The coating includes particles driven into the surface to a substantial depth. The uncoated substrate is free of the detectable physical characteristic. The coating is confined to a limited area of the substrate surface and itself constitutes a code or is laid down in a pattern for identification. A second coating can be applied so that all areas of the surface have the same appearance to mask visual detection of the first coating. The first coating can be of such a nature as to defeat electrostatic copying, particular, color copying, by effecting a discernible difference between the original and the copy.

US Patent:

49735322, Nov 27, 1990

Filed:

Apr 5, 1989

Appl. No.:

7/333662

Inventors:

Henry T. Taskier - Fanwood NJ
Steven M. Mullins - Charlotte NC
Ellen A. Langford - Charlotte NC
Robert J. Fleming - Rock Hill SC

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

H01M 650

US Classification:

429 62

Abstract:

A battery separator includes a porous substrate and a thermal fuse material adhered to at least one surface of said porous substrate. The thermal fuse material is adhered to the substrate surface in a predetermined geometric array thereupon so as to establish open areas of the at least one substrate surface to thereby allow ionic migration therethrough. The thermal fuse material forming the geometric array on the substrate surface may itself define open pores to further facilitate such ionic migration. The thermal fuse material melts at or near a predetermined threshold temperature so that the substrate's permeability irreversibly becomes significantly decreased and thus interrupts the chemical reaction in an electrochemical battery. In such a manner, batteries of improved safety may be provided using the separators of this invention.