Seneviratne; Padmasiri Daya
Patent Applications and Registrations
Patent applications and USPTO patent grants for Seneviratne; Padmasiri Daya.The latest application filed is for "dual ball upper internal blow out preventer valve".
- Seneviratne; Padmasiri Daya - Fullerton CA US
| Patent | Date |
|---|---|
| Dual ball upper internal blow out preventer valve Grant 8,752,653 - Seneviratne , et al. June 17, 2 | 2014-06-17 |
| Dual Ball Upper Internal Blow Out Preventer Valve App 20110226485 - Seneviratne; Padmasiri Daya ; et al. | 2011-09-22 |
| Triple valve blow out preventer Grant 7,287,544 - Seneviratne , et al. October 30, 2 | 2007-10-30 |
| Internal blow out preventer ball and seat Grant 7,121,295 - Seneviratne , et al. October 17, 2 | 2006-10-17 |
| Triple valve blow out preventer App 20060191679 - Seneviratne; Padmasiri Daya ; et al. | 2006-08-31 |
| Washpipe assembly Grant 6,994,174 - Seneviratne February 7, 2 | 2006-02-07 |
| Internal blow out preventer ball and seat App 20050081918 - Seneviratne, Padmasiri Daya ; et al. | 2005-04-21 |
| Washpipe assembly App 20040177971 - Seneviratne, Padmasiri Daya | 2004-09-16 |
| Washpipe assembly Grant 6,725,949 - Seneviratne April 27, 2 | 2004-04-27 |
| Washpipe assembly App 20030051883 - Seneviratne, Padmasiri Daya | 2003-03-20 |
| Apparatus and method for rapid replacement of upper blowout preventers Grant 6,276,450 - Seneviratne August 21, 2 | 2001-08-21 |
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