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:
Jul. 01, 2014
Filed:
Jul. 19, 2013
Applicant:
Mark T. Dinsmore, Sudbury, MA (US);
Inventor:
Mark T. Dinsmore, Sudbury, MA (US);
Assignee:
Thermo Scientific Portable Analytical Instruments Inc., Tewksbury, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 17/04 (2012.01);
U.S. Cl.
CPC ...
Abstract
An electrically heated planar cathode for use in miniature x-ray tubes may be spiral design laser cut from a thin tantalum alloy ribbon foil (with grain stabilizing features). Bare ribbon is mounted to an aluminum nitride substrate in a manner that is puts the ribbon in minimal tension before it is machined into the spiral pattern. The spiral pattern can be optimized for electrical, thermal, and emission characteristics.