Electric Power Research Institute Incorporated

University of Connecticut

Bruce S Bernstein

Donald J Mangold

William A McMahon

William W Harlowe, Jr

Leslie S Rubin

Matthew S Mashikian

Joseph H Groeger

John A Tanaka

The present invention provides an apparatus and method for controlled release of a fumigant into a wooden structure to prevent decay of that structure. According to the present invention, a fumigant in an ampule or container is inserted into the wooden structure. The ampule or container is made of a polymeric material that does not react with the fumigant, but having walls which are permeable to the fumigant such that, when inserted into the wooden structure, the rate of release of the fumigant through the walls of the ampule is slow enough to continuously treat and arrest decay of the wooden structure, particularly decay caused by fungi, over extended periods of time (i.e., 1, 5, 7, 10, 15, 20 or 30 years). The rate of release of the fumigant can be controlled by the type of fumigant, the shape of the container, the specific polymer used to make the container, and by the thickness of the container wall.

Controlled release ampule containing a fumigant

Controlled fumigation of wooden structures

An electrical cable protected against moisture by a tubular liquid crystal film having its molecules multiaxially oriented.

Moisture resistant underground cable

An improved jacket material for insulated electric cable wherein the jacket contains one or more additives of an ion exchange resin and/or an ionic scavenging compound for neutralizing or capturing ionic impurities.

Jacket for insulated electric cable

The use of inorganic additives such as mica in the polyolefin layer of paper polyolefin paper laminates improves the electrical characteristics, gives resistance to discharge, and facilitates reduction of swelling in contact with oil. Accordingly, the present invention provides laminated paper polyolefin paper composites comprising first and second fiber paper layers, and a polyolefin layer comprising an inorganic additive such as mica.

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Rockville, MD, United States of America

Bruce S Bernstein