The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1996
Filed:
Dec. 06, 1994
Ronald N Hubbard, Rancho Santa Fe, CA (US);
General Atomics, San Diego, CA (US);
Abstract
Infrared (IR) reflective radio frequency (RF) transparent coating materials are comprised of coated microspheres dispersed as discrete pigment particles in an IR and RF transparent film forming binder. Each microsphere is comprised of a dielectric core, a layer of IR reflective RF conductive material on the core, and an IR and RF transparent layer of insulating material coated over and encapsulating the reflective layer. The insulating layer prohibits transmission of currents between the conductive layers and the spheres are of sufficiently small size in relation to RF wavelengths as to permit passage of RF energy through the coating. The coated microspheres are visually colored, and being spherical, provide on a coated object a film or coating that is visually colored and highly diffuse, as well as being IR reflective and RF transparent. Methods of making the discrete spherical pigment particles comprise the steps of levitating microspheres in a coating deposition chamber and depositing onto the levitated spheres the desired coating or coatings.