Charles D. Calkins

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Tulsa, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
High temperature completion plug
- Patent number 7,353,839
- Issue date Apr 8, 2008
- TDW Delaware, Inc.
- Charles D. Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Apparatus, systems and methods for plugging a high temperature pipe
- Patent number 7,281,543
- Issue date Oct 16, 2007
- Charles D. Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Cam-assisted, wedge actuated, metal-to-metal seal, block and bleed...
- Patent number 7,270,139
- Issue date Sep 18, 2007
- TDW Delaware, Inc.
- Charles D. Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Apparatus for tapping a hole in a pipeline
- Patent number 6,648,562
- Issue date Nov 18, 2003
- Charles D. Calkins
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
High temperature completion plug
- Publication number 20060260685
- Publication date Nov 23, 2006
- TDW Delaware, Inc.
- Charles D. Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Apparatus, systems and methods for plugging a high temperature pipe
- Publication number 20060243326
- Publication date Nov 2, 2006
- Charles Dale Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Cam-assisted, wedge actuated, metal-to-metal seal, block and bleed...
- Publication number 20060237060
- Publication date Oct 26, 2006
- TDW Delaware, Inc.
- Charles D. Calkins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...