Frederick Hartman

US Patent:

20040064114, Apr 1, 2004

Filed:

Sep 27, 2002

Appl. No.:

10/259093

Inventors:

Benoit David - Washington Crossing PA, US
Christopher Holliday - Yardley PA, US
Frederick Hartman - Englishtown NJ, US
Ronald Gillespie - North Brunswick NJ, US

International Classification:

A61F013/15
A61F013/20

US Classification:

604/361000

Abstract:

A system for detecting wetness in an absorbent article has an absorbent structure, at least one sensor in contact with the absorbent structure, a remote interrogating device, and a reporting element coupled to the interrogating device. The at least one sensor provides a variable electrical output dependent upon an amount of aqueous liquid associated with the absorbent structure. The remote interrogating unit is capable of detecting changes in the variable electrical output of the at least one sensor. A method of controlling liquid bodily exudates is also disclosed. The method includes placing a first disposable article in proximity to a source of liquid bodily exudates, allowing the absorbent structure to absorb liquid bodily exudates, transmitting a signal from a remote interrogating device, detecting a change in the variable electrical output of the at least one sensor, and reporting information based upon the signal detected. The disposable article includes an absorbent structure and at least one sensor associated with the absorbent structure. The sensor provides a variable electrical output dependent upon an amount of aqueous liquid associated with the absorbent structure.

US Patent:

48245119, Apr 25, 1989

Filed:

Oct 19, 1987

Appl. No.:

7/109586

Inventors:

Frederick N. Hartman - Wilmington DE
Alan C. Knight - Parkersburg WV

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C09J 510

US Classification:

1563066

Abstract:

A multilayer circuit board consisting of multiple circuit layers supported on sheets of PTFE or PTFE containing a fibrous stiffening agent, said circuit-bearing sheets being joined in fixed relative positions by means of separating layers of a adhesive unsintered tetrafluoroethylene resin.