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:
Jan. 13, 1976
Filed:
Apr. 01, 1974
Lee T Todd, Jr, Lexington, MA (US);
Eugene F Farrell, Lexington, MA (US);
Arthur Linz, Winchester, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A process for preparing cathodochromic materials whereby coloration properties of the materials are enhanced by a low-temperature re-crystallization process. Crystalline powders formed using either hydrothermal or sintering growth techniques are hydrothermally re-crystallized at a temperature sufficiently high and for a time sufficiently long to effect re-crystallization. The temperature range for hydrothermal re-crystallization is 60.degree.C to 300.degree.C and the re-crystallization growth time is at least the order of 12 hours and, more typically, the order of three days. There is shown a cathode ray tube employing said materials.