Extension for a heating duct
Description
FIG. 1 is a perspective view showing my new design for an extension for a heating duct;
FIG. 2 is a left side elevation view which is a mirror image of the right side elevation view;
FIG. 3 is a bottom plan view;
FIG. 4 is a front elevation view which is a mirror image of the rear elevation view; and,
FIG. 5 is a top plan view.
Claims
The ornamental design for an extension for a heating duct, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
24660 | July 1859 | Potts |
567231 | September 1896 | Glauber |
925762 | June 1909 | Eager |
1908821 | May 1933 | Cornell, Jr. |
2086007 | July 1937 | Tompkins |
2215318 | September 1940 | Bristol |
2563578 | August 1951 | Candee |
3610288 | October 1971 | Carr et al. |
3645566 | February 1972 | Dyek |
4067353 | January 10, 1978 | DeHoff |
4491349 | January 1, 1985 | Rice et al. |
4750411 | June 14, 1988 | Eversole |
4773197 | September 27, 1988 | Sullivan |
D298276 | October 25, 1988 | Butcher |
D314820 | February 19, 1991 | Sullivan |
5036636 | August 6, 1991 | Hasty |
5080403 | January 14, 1992 | Paoluccio |
5240288 | August 31, 1993 | Inda et al. |
D451589 | December 4, 2001 | Axelsson |
871635 | June 1961 | GB |
Patent History
Patent number: D471972
Type: Grant
Filed: Nov 7, 2001
Date of Patent: Mar 18, 2003
Inventor: Murray A. Hebert (Baxter, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Robert A. Delehanty
Attorney, Agent or Law Firms: Gerald E. Helget, Nelson R. Capes, Briggs and Morgan
Application Number: 29/151,503
Type: Grant
Filed: Nov 7, 2001
Date of Patent: Mar 18, 2003
Inventor: Murray A. Hebert (Baxter, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Robert A. Delehanty
Attorney, Agent or Law Firms: Gerald E. Helget, Nelson R. Capes, Briggs and Morgan
Application Number: 29/151,503
Classifications
Current U.S. Class:
Vent, Ductwork, Or Element Thereof (D23/393)
International Classification: 2303;
International Classification: 2303;