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. 27, 2003
Filed:
Oct. 29, 2001
Harvey C. Nathanson, Pittsburgh, PA (US);
Irving Liberman, Pittsburgh, PA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
Physics package apparatus for a cell type atomic clock includes a cell structure having a central plate sandwiched between top and bottom plates. The central plate has a central interior aperture which together with the top and bottom plates forms an internal cavity for containment of an active vapor. The central plate includes a reservoir for holding a source of the active vapor, and a channel connecting the reservoir with the internal cavity. A heater is provided on the underside of the bottom plate for heating the vapor. The plates are batch processed on respective wafers which are subsequently joined together and cut into individual cell structures.