Longsworth; Ralph
Patent Applications and Registrations
Patent applications and USPTO patent grants for Longsworth; Ralph.The latest application filed is for "mri cool down apparatus".
- Longsworth; Ralph - Allentown PA
| Patent | Date |
|---|---|
| Hybrid Brayton--Gifford-McMahon expander Grant 10,794,616 - Longsworth October 6, 2 | 2020-10-06 |
| Brayton cycle engine with high displacement rate and low vibration Grant 10,677,498 - Longsworth | 2020-06-09 |
| MRI cool down apparatus Grant 9,897,350 - Longsworth February 20, 2 | 2018-02-20 |
| Gas balanced cryogenic expansion engine Grant 9,581,360 - Dunn , et al. February 28, 2 | 2017-02-28 |
| Gas balanced brayton cycle cold water vapor cryopump Grant 9,546,647 - Longsworth January 17, 2 | 2017-01-17 |
| Mri Cool Down Apparatus App 20150354865 - LONGSWORTH; Ralph | 2015-12-10 |
| Cryopump drain and vent Grant 9,186,601 - Longsworth November 17, 2 | 2015-11-17 |
| Low profile cryopump Grant 9,174,144 - Longsworth November 3, 2 | 2015-11-03 |
| Cryogenic Engine With Rotary Valve App 20150226465 - Longsworth; Ralph | 2015-08-13 |
| Gas balanced cryogenic expansion engine Grant 9,080,794 - Longsworth July 14, 2 | 2015-07-14 |
| HYBRID BRAYTON - GIFFORD-McMAHON EXPANDER App 20150176867 - Longsworth; Ralph | 2015-06-25 |
| Brayton Cycle Engine App 20150159586 - Longsworth; Ralph | 2015-06-11 |
| Air cooled helium compressor Grant 8,978,400 - Dunn , et al. March 17, 2 | 2015-03-17 |
| 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 |
| Low Profile Cryopump App 20130276466 - Longsworth; Ralph | 2013-10-24 |
| Cryopump Drain And Vent App 20130276467 - Longsworth; Ralph | 2013-10-24 |
| Fast cool down cryogenic refrigerator Grant 8,448,461 - Longsworth May 28, 2 | 2013-05-28 |
| Co-axial multi-stage pulse tube for helium recondensation Grant 8,418,479 - Xu , et al. April 16, 2 | 2013-04-16 |
| Gas Balanced Brayton Cycle Cold Water Vapor Cryopump App 20130008190 - Longsworth; Ralph | 2013-01-10 |
| Gas Balanced Cryogenic Expansion Engine App 20120285181 - Dunn; Stephen ; et al. | 2012-11-15 |
| Fast Cool Down Cryogenic Refrigerator App 20120085121 - Longsworth; Ralph | 2012-04-12 |
| Gas Balanced Cryogenic Expansion Engine App 20110219810 - Longsworth; Ralph | 2011-09-15 |
| Air Cooled Helium Compressor App 20110107790 - Dunn; Stephen ; et al. | 2011-05-12 |
| Cryopump Louver Extension App 20100011784 - Longsworth; Ralph | 2010-01-21 |
| Co-axial Multi-stage Pulse Tube For Helium Recondensation App 20090173083 - Xu; Mingyao ; et al. | 2009-07-09 |
| Co-axial multi-stage pulse tube for helium recondensation Grant 7,497,084 - Xu , et al. March 3, 2 | 2009-03-03 |
| Co-axial multi-stage pulse tube for helium recondensation App 20060144054 - Xu; Mingyao ; et al. | 2006-07-06 |
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