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. 09, 1986
Filed:
Aug. 31, 1984
Applicant:
Inventors:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G21C / ;
U.S. Cl.
CPC ...
376412 ; 376456 ;
Abstract
A tubular sheath for particulate nuclear fuel has microporous retaining elements formed by winding metal strip about a central pin and pushing the resulting spiral into the sheath ends. The metal strip has transverse grooves formed by a photo-etching process which form axial gas passages narrow enough to prevent passage of fuel particles. Suitable materials for the strip include molybdenum and tungsten. A stainless steel strip can be used if a molybdenum or tungsten disc is placed between it and the fuel.