Welkie; David G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Welkie; David G..The latest application filed is for "dynamic electron impact ion source".
Company Profile
5.37.22
- Welkie; David G. - Trumbull CT
- Welkie; David G. - Trumbell CT
- Welkie; David G. - Branford CT
- Welkie; David G. - Chanhassen MN
Patent Activity
| Patent | Date |
|---|---|
| Dynamic electron impact ion source Grant 11,276,544 - Welkie , et al. March 15, 2 | 2022-03-15 |
| Dynamic Electron Impact Ion Source App 20210257180 - Welkie; David G. ; et al. | 2021-08-19 |
| Dynamic electron impact ion source Grant 10,879,030 - Welkie , et al. December 29, 2 | 2020-12-29 |
| RF ion guide with axial fields Grant 10,796,893 - Welkie October 6, 2 | 2020-10-06 |
| Ion transfer from electron ionization sources Grant 10,692,712 - Welkie , et al. | 2020-06-23 |
| Rf Ion Guide With Axial Fields App 20200035477 - Welkie; David G. | 2020-01-30 |
| Dynamic Electron Impact Ion Source App 20200020502 - Welkie; David G. ; et al. | 2020-01-16 |
| RF ion guide with axial fields Grant 10,453,666 - Welkie Oc | 2019-10-22 |
| Rf Ion Guide With Axial Fields App 20190043705 - Welkie; David G. | 2019-02-07 |
| Ion Transfer From Electron Ionization Sources App 20180286657 - Welkie; David G. ; et al. | 2018-10-04 |
| RF ion guide with axial fields Grant 10,032,617 - Welkie July 24, 2 | 2018-07-24 |
| Rf Ion Guide With Axial Fields App 20170178885 - Welkie; David G. | 2017-06-22 |
| RF ion guide with axial fields Grant 9,613,788 - Welkie April 4, 2 | 2017-04-04 |
| Orthogonal acceleration system for time-of-flight mass spectrometer Grant 9,576,782 - Welkie February 21, 2 | 2017-02-21 |
| Orthogonal Acceleration System For Time-of-flight Mass Spectrometer App 20160071717 - Welkie; David G. | 2016-03-10 |
| RF Ion Guide with Axial Fields App 20150364309 - Welkie; David G. | 2015-12-17 |
| Orthogonal acceleration system for time-of-flight mass spectrometer Grant 9,177,777 - Welkie November 3, 2 | 2015-11-03 |
| Orthogonal acceleration TOF with ion guide mode Grant 9,129,790 - Welkie September 8, 2 | 2015-09-08 |
| Orthogonal Acceleration System For Time-of-flight Mass Spectrometer App 20150155153 - Welkie; David G. | 2015-06-04 |
| Fragmentation methods for mass spectrometry Grant 8,981,290 - Whitehouse , et al. March 17, 2 | 2015-03-17 |
| Electrostatic Lenses And Systems Including The Same App 20150069262 - Welkie; David G. | 2015-03-12 |
| Orthogonal acceleration system for time-of-flight mass spectrometer Grant 8,975,580 - Welkie March 10, 2 | 2015-03-10 |
| Electrostatic lenses and systems including the same Grant 8,921,803 - Welkie December 30, 2 | 2014-12-30 |
| Orthogonal Acceleration System For Time-of-flight Mass Spectrometer App 20140264011 - Welkie; David G. | 2014-09-18 |
| Orthogonal Acceleration Tof With Ion Guide Mode App 20140264005 - Welkie; David G. | 2014-09-18 |
| Fragmentation Methods for Mass Spectrometry App 20140209814 - Whitehouse; Craig M. ; et al. | 2014-07-31 |
| Multipole ion guide interface for reduced background noise in mass spectrometry Grant 8,723,107 - Whitehouse , et al. May 13, 2 | 2014-05-13 |
| Fragmentation methods for mass spectrometry Grant 8,686,356 - Whitehouse , et al. April 1, 2 | 2014-04-01 |
| Multipole Ion Guide Interface for Reduced Background Noise in Mass Spectrometry App 20140008530 - Whitehouse; Craig M. ; et al. | 2014-01-09 |
| Fragmentation Methods for Mass Spectrometry App 20130221233 - Whitehouse; Craig M. ; et al. | 2013-08-29 |
| Multipole ion guide interface for reduced background noise in mass spectrometry Grant 8,507,850 - Whitehouse , et al. August 13, 2 | 2013-08-13 |
| Finite differences methods Grant 8,380,775 - Welkie February 19, 2 | 2013-02-19 |
| Fragmentation methods for mass spectrometry Grant 8,334,507 - Whitehouse , et al. December 18, 2 | 2012-12-18 |
| Electrostatic Lenses And Systems Including The Same App 20120223244 - Welkie; David G. | 2012-09-06 |
| Multiple detection systems Grant 7,928,361 - Whitehouse , et al. April 19, 2 | 2011-04-19 |
| Mass spectrometry with segmented RF multiple ion guides in various pressure regions Grant 7,858,926 - Whitehouse , et al. December 28, 2 | 2010-12-28 |
| RF surfaces and RF ion guides Grant 7,786,435 - Whitehouse , et al. August 31, 2 | 2010-08-31 |
| Multipole ion guide interface for reduced background noise in mass spectrometry App 20090218486 - Whitehouse; Craig M. ; et al. | 2009-09-03 |
| Finite Differences Methods App 20090083356 - Welkie; David G. | 2009-03-26 |
| RF Surfaces and RF Ion Guides App 20080296495 - Whitehouse; Craig M. ; et al. | 2008-12-04 |
| RF surfaces and RF ion guides Grant 7,365,317 - Whitehouse , et al. April 29, 2 | 2008-04-29 |
| Apparatus and methods for reduction of coherent noise in a digital signal averager Grant 7,321,847 - Welkie , et al. January 22, 2 | 2008-01-22 |
| Multiple detection systems Grant 7,265,346 - Whitehouse , et al. September 4, 2 | 2007-09-04 |
| Fragmentation methods for mass spectrometry Grant 7,049,584 - Whitehouse , et al. May 23, 2 | 2006-05-23 |
| Apparatus and methods for reduction of coherent noise in a digital signal averager Grant 7,043,406 - Welkie , et al. May 9, 2 | 2006-05-09 |
| Mass spectrometry with segmented RF multiple ion guides in various pressure regions Grant 7,034,292 - Whitehouse , et al. April 25, 2 | 2006-04-25 |
| RF surfaces and RF ion guides App 20050258364 - Whitehouse, Craig M. ; et al. | 2005-11-24 |
| Fragmentation methods for mass spectrometry Grant 6,919,562 - Whitehouse , et al. July 19, 2 | 2005-07-19 |
| Charged particle trapping in near-surface potential wells Grant 6,872,941 - Whitehouse , et al. March 29, 2 | 2005-03-29 |
| Charged particle trapping in near-surface potential wells Grant 6,683,301 - Whitehouse , et al. January 27, 2 | 2004-01-27 |
| Multiple detection systems App 20020175292 - Whitehouse, Craig M. ; et al. | 2002-11-28 |
| Charged particle trapping in near-surface potential wells App 20020100870 - Whitehouse, Craig ; et al. | 2002-08-01 |
| Ion source and accelerator for improved dynamic range and mass selection in a time of flight mass spectrometer Grant 6,080,985 - Welkie , et al. June 27, 2 | 2000-06-27 |
| Carrier gas separator for mass spectroscopy Grant 6,043,488 - Bahatt , et al. March 28, 2 | 2000-03-28 |
| Primary ion beam raster gating technique for secondary ion mass spectrometer system Grant 4,661,702 - Welkie April 28, 1 | 1987-04-28 |
| Vacuum-compatible air-cooled plasma device Grant 4,659,899 - Welkie , et al. April 21, 1 | 1987-04-21 |
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