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:
Nov. 13, 1990
Filed:
Jul. 13, 1989
James L Wales, Caversham, GB;
Thorn EMI plc, London, GB;
Abstract
A method is provided for manufacturing a cold cathode field emission device. The method comprises the steps of: providing a layer of anodised alumina having a plurality of elongate pores which are substantially orthogonal to major surfaces of the layer; filling said pores completely with an electron emission material, and then removing at least a part of said layer to form a defined surface of said layer and to produce a plurality of electron emissive spikes extruding from and at an angle to said defined surface wherein a plurality of electron emissive structures are produced, each structure comprising a plurality of electron emissive spikes inclined to one another.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile