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:
Sep. 07, 1976
Filed:
Jul. 17, 1974
Everett A Gunning, Lock Haven, PA (US);
Charles H Rehkopf, Seneca Falls, NY (US);
GTE Sylvania Incorporated, Stamford, CT (US);
Abstract
Means for deterring the build-up of a deleterious negative charge on the neck portion of a cathode ray tube is provided for utilization in especially those tubes wherein the electron gun structure is particularly close to the glass surface of the encompassing neck. The charge inhibiting means is formed of a circumferential band of insulative oxide material having a roughened topography to provide a discontinuous surface condition to break-up the deposition of metallic sublimation resultant from high temperature tube processing and conditioning. The band is oriented substantially in the rearward section of the neck on the portion thereof substantially encompassing the cathode region of the gun structure.