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US 4,378,322 AGranted
Electromagnetic radiation shielding composites and method of production thereof
AssigneeTransmet Corporation
InventorsThomas J. Atterbury, David E. Stutz
Life of this patent
Estimating the term…
Abstract
Preparation of electromagnetic radiation shielding composite exhibiting high conductivity and low resistance is shown by applying an electrical potential difference across a composite comprising an electrically conductive material dispersed within a foamed matrix material and applying at least one additional electrical potential difference being greater than the potential difference which precedes it.
Claims17
A method of preparing an electromagnetic radiation shielding composite which exhibits high conductivity and low resistance comprising:
- providing a composite comprising an electrically conductive material dispersed within a foamed matrix material;
- and
- applying an electrical potential difference across said composite such that a first and at least one additional electrical potential difference are applied across said composite, each said potential difference being greater than the potential difference which precedes it and each said additional potential difference which is applied being of such a value so as to increase the conductivity of said composite in comparison to that which said composite exhibited prior to applying said additional electrical potential difference, said additional electrical potential difference being applied and the value thereof being increased until the conductivity of the composite is increased to the extent required to enable the composite to serve as an effective shield for electromagnetic radiation.
Dependencies are inferred from the claim text.