Electric tank heater
Description
Claims
The ornamental design for an electric tank heater, as shown and described.
Referenced Cited
U.S. Patent Documents
1875306 | August 1932 | Williams |
D123420 | November 1940 | Rush |
D130349 | November 1941 | Gardner |
D142505 | October 1945 | Warner |
2403670 | July 1946 | Martin |
D204721 | May 1966 | Arak |
3979574 | September 7, 1976 | Rynard |
D290289 | June 9, 1987 | Pressel et al. |
4687905 | August 18, 1987 | Cunningham et al. |
4848616 | July 18, 1989 | Nozaki |
5293446 | March 8, 1994 | Owens et al. |
D346650 | May 3, 1994 | Bremer |
5335311 | August 2, 1994 | Groothuizen |
D381409 | July 22, 1997 | Fleischer et al. |
5835679 | November 10, 1998 | Eckman et al. |
5844211 | December 1, 1998 | Henry et al. |
6124579 | September 26, 2000 | Steinhauser et al. |
Patent History
Patent number: D604815
Type: Grant
Filed: Mar 25, 2009
Date of Patent: Nov 24, 2009
Assignee: Petrostar Petroleum Corporation
Inventor: Robert A. Sim (Burnaby)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Ania K Dworzecka
Attorney: St. Onge Steward Johnston & Reens LLC
Application Number: 29/334,368
Type: Grant
Filed: Mar 25, 2009
Date of Patent: Nov 24, 2009
Assignee: Petrostar Petroleum Corporation
Inventor: Robert A. Sim (Burnaby)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Ania K Dworzecka
Attorney: St. Onge Steward Johnston & Reens LLC
Application Number: 29/334,368
Classifications