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. 29, 1980
Filed:
Dec. 29, 1978
Applicant:
Inventor:
William W Kastilahn, Caledonia, IL (US);
Assignee:
Alco Standard Corporation, Valley Forge, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; F27D / ;
U.S. Cl.
CPC ...
13 25 ; 13 20 ; 13 22 ; 174 42 ; 206443 ; 206589 ; 188 / ; 219536 ; 219546 ; 338234 ;
Abstract
Electrical resistance heating elements made of graphite and disposed in a ceramic tube are protected against breakage during shipment by cardboard inserts which are telescoped over the heating elements and into the tube. When the heating elements are first energized, the inserts burn away into harmless ash which falls to the bottom of the tube.