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:
Oct. 30, 2007
Filed:
Dec. 21, 2006
Applicant:
Raechell Maria Thuot, Racine, WI (US);
Inventor:
Raechell Maria Thuot, Racine, WI (US);
Assignee:
S.C. Johnson & Son, Inc., Racine, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/08 (2006.01); H01C 7/13 (2006.01);
U.S. Cl.
CPC ...
Abstract
PTC electrical heating devices are disclosed which are suitable to vaporize air treatment chemicals from an impregnated slab, such as insect repellents. In one form an electrical contact to a PTC heater element is provided with a bowl-shaped contact head to reduce the risk of edges of the contact cracking the heater element. In other forms peg and recess structures interact with apertures on a heat transfer plate to facilitate assembly of the parts of the structure.