DUNN; Stephen
Patent Applications and Registrations
Patent applications and USPTO patent grants for DUNN; Stephen.The latest application filed is for "dual helium compressors".
- DUNN; Stephen - Bethlehem PA
- Dunn; Stephen - Houston TX
- Dunn; Stephen - Allentown PA
- Dunn; Stephen - Thornhill CA
- Dunn; Stephen - Calgary CA
- Dunn; Stephen - Levenshulme GB2
| Patent | Date |
|---|---|
| Dual Helium Compressors App 20220003462 - SEITZ; Eric Robert ; et al. | 2022-01-06 |
| Dual helium compressors Grant 11,149,992 - Seitz , et al. October 19, 2 | 2021-10-19 |
| Collapsible three legged platform Grant 10,791,873 - Jaggard , et al. October 6, 2 | 2020-10-06 |
| Collapsible Three Legged Platform App 20190133375 - Jaggard; Steve R. ; et al. | 2019-05-09 |
| Collapsible three legged platform Grant 10,208,889 - Jaggard , et al. Feb | 2019-02-19 |
| Collapsible Three Legged Platform App 20180340647 - Jaggard; Steve R. ; et al. | 2018-11-29 |
| Dual Helium Compressors App 20170176055 - Seitz; Eric Robert ; et al. | 2017-06-22 |
| Cold Start Helium Compressor App 20170175743 - Dunn; Stephen ; et al. | 2017-06-22 |
| Gas balanced cryogenic expansion engine Grant 9,581,360 - Dunn , et al. February 28, 2 | 2017-02-28 |
| Air cooled helium compressor Grant 8,978,400 - Dunn , et al. March 17, 2 | 2015-03-17 |
| Situ extraction process for the recovery of hydrocarbons Grant 8,857,512 - Nenniger , et al. October 14, 2 | 2014-10-14 |
| Gas Balanced Cryogenic Expansion Engine App 20140290278 - Dunn; Stephen ; et al. | 2014-10-02 |
| Gas balanced cryogenic expansion engine Grant 8,776,534 - Dunn , et al. July 15, 2 | 2014-07-15 |
| Gas Balanced Cryogenic Expansion Engine App 20120285181 - Dunn; Stephen ; et al. | 2012-11-15 |
| Method for extracting and upgrading of heavy and semi-heavy oils and bitumens Grant 7,947,165 - Berkowitz , et al. May 24, 2 | 2011-05-24 |
| Air Cooled Helium Compressor App 20110107790 - Dunn; Stephen ; et al. | 2011-05-12 |
| Situ Extraction Process For The Recovery Of Hydrocarbons App 20100236783 - Nenniger; John ; et al. | 2010-09-23 |
| Compressor with oil bypass Grant 7,674,099 - Dunn March 9, 2 | 2010-03-09 |
| Compressor with oil bypass App 20070253854 - Dunn; Stephen | 2007-11-01 |
| Method for extracting and upgrading of heavy and semi-heavy oils and bitumens App 20070056881 - Berkowitz; Brian ; et al. | 2007-03-15 |
| Database management system Grant 5,668,991 - Dunn , et al. September 16, 1 | 1997-09-16 |
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