Melvin O. Castillo

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Texas City, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Valves with multi-directional ball check
- Patent number 10,436,335
- Issue date Oct 8, 2019
- Richard C. Hughes
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Bidirectional sleeved/plug ball check valve
- Patent number 8,584,705
- Issue date Nov 19, 2013
- Richard C Hughes
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Methods of use & valves with multi-directional ball check
- Publication number 20200088311
- Publication date Mar 19, 2020
- James C. Hertenberger
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Valves With Multi-Directional Ball Check
- Publication number 20170138491
- Publication date May 18, 2017
- Richard C. Hughes
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Valves with multi-directional ball check
- Publication number 20150129043
- Publication date May 14, 2015
- Richard C. Hughes
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Bidirectional Sleeved/Plug Ball Check Valve
- Publication number 20110253922
- Publication date Oct 20, 2011
- Richard C. Hughes
- G01 - MEASURING TESTING
Information Patent Application
Gage Cock Ball Valve
- Publication number 20090056438
- Publication date Mar 5, 2009
- Richard C. Hughes
- G01 - MEASURING TESTING