Flare stack burner having spherical valve
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Description
The broken lines in the drawing represent portions of the flare stack burner having spherical valve and environmental subject matter that form no part of the claim.
Claims
The ornamental design for a flare stack burner having spherical valve, as shown and described.
Referenced Cited
U.S. Patent Documents
Other references
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Patent History
Patent number: D684682
Type: Grant
Filed: Oct 4, 2012
Date of Patent: Jun 18, 2013
Assignee: Steffes Corporation (Dickinson, ND)
Inventors: Dean A. Kovash (Manning, ND), Todd C. Mayer (Dickinson, ND)
Primary Examiner: Karen S Acker
Application Number: 29/421,989
Type: Grant
Filed: Oct 4, 2012
Date of Patent: Jun 18, 2013
Assignee: Steffes Corporation (Dickinson, ND)
Inventors: Dean A. Kovash (Manning, ND), Todd C. Mayer (Dickinson, ND)
Primary Examiner: Karen S Acker
Application Number: 29/421,989
Classifications
Current U.S. Class:
Burner Or Heater Coil (D23/415)