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:
May. 11, 1999
Filed:
Dec. 02, 1996
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing CRT interior parts made of material such as of iron or steel has the steps of: introducing hydrocarbon and air into a conversion furnace, thereby producing an exothermic gas; cooling the exothermic gas to a predetermined temperature higher than a dew point of the exothermic gas; and introducing the exothermic gas at a temperature higher than the dew point into a blackening furnace which houses the CRT interior parts, thereby producing a blackened film on a surface of each of the CRT interior parts. The blackened film is mainly consisting of Fe.sub.3 O.sub.4. The temperature of the exothermic gas, when introduced in the blackening furnace, may be higher than a boiling point of each component composing the exothermic gas.