McDowell; Donald Elwin
Patent Applications and Registrations
Patent applications and USPTO patent grants for McDowell; Donald Elwin.The latest application filed is for "expandable centralizer for expandable pipe string".
- McDowell; Donald Elwin - Millsap TX US
| Patent | Date |
|---|---|
| Expandable centralizer for expandable pipe string Grant 8,770,280 - Buytaert , et al. July 8, 2 | 2014-07-08 |
| Expandable Centralizer For Expandable Pipe String App 20120227959 - Buytaert; Jean ; et al. | 2012-09-13 |
| Expandable centralizer for expandable pipe string Grant 8,196,654 - Buytaert , et al. June 12, 2 | 2012-06-12 |
| Expandable Centralizer For Expandable Pipe String App 20110186289 - Buytaert; Jean ; et al. | 2011-08-04 |
| Expandable centralizer for expandable pipe string Grant 7,878,241 - Buytaert , et al. February 1, 2 | 2011-02-01 |
| Expandable Centralizer For Expandable Pipe String App 20080283253 - Buytaert; Jean ; et al. | 2008-11-20 |
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