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:
Dec. 11, 1990
Filed:
Nov. 02, 1989
Applicant:
Inventor:
Seung J Lee, Suwon, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313276 ; 313310 ; 313341 ; 445 29 ; 228222 ;
Abstract
Method of fabricating a direct-heated cathode structure comprising prepunching process wherein fixing segments are inserted to slot in the ceramic base and bended about 45, and finish punching process wherein upper end of prepunched fixing segments are pressed over the ceramic base. Direct-heated cathode structure comprising supporting bars with a supporting protuberance at their upper end and a barricade at their middle to prevent deformation during welding of springs and to confine affection of buckling during electric resistance welding of conductive tape respectively.
Quick Actions:
Lee, Seung. (1990). Direct-heated cathode structure and method for the fabrication thereof (U.S. Patent No. 4976643). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4976643
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile