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:
Mar. 05, 1991
Filed:
Dec. 05, 1988
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A pitted light diffusive coating having an excellent light diffusion effect and a method of forming the coating and a halogen lamp with the coating are disclosed. The light diffusive coating includes pits on the surface of a continuous coating consisting of a metal oxide formed on a base, and the coating is substantially free of bubbles. The pitted light diffusive coating is formed by coating a base with an organometallic compound and a high boiling-point organic solvent and baking the coating at about 400.degree. C. to 500.degree. C. The halogen lamp has a pitted light diffusive coating formed on an infrared reflective coating on the surface of the outer vessel. Strain, caused by the difference in the thermal expansion coefficient of the structural material of the outer vessel and the structural material of the light diffusive layer occurring when the outer vessel is at a high temperature, is absorbed by the pitted structure, and peeling is prevented.