Patent US3254209A successfully refreshed from Google Patents.
US3254209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for increasing the ionization of impurity ions in a mass spectrometer
Assignee: General Dynamics Corp
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Filing: 1962-11-29
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Granted: 1966-05-31
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Wade L Fite
- 👤 William R Snow
- 👤 John A Rutherford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:33
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A METHOD OF DETECTING SMALL IMPURITIES IN SAMPLES OF CERTAIN GASES WHEN THE IONIZATION POTENTIAL OF THE IMPURITY IS LESS THAN THE IONIZATION POTENTIAL OF THE MAIN PART OF THE GAS, SAID METHOD COMPRISING APPLYING AN ENERGY PULSE TO THE GAS TO IONIZE A FRACTION OF THE GAS, DISCONTINUING SAID PUSLE TO PERMIT THE TRANSFER OF CHARGE FROM THE IONS OF THE MAIN PART OF THE GAS TO THE MORE EASILY IONIZED IMPURITY SO AS TO INCREASE THE NUMBER OF IMPURITY IONS AT THE EXPENSE OF THE IONS OF THE MAIN PART OF THE GAS DURING THE INTERVAL FOLLOWING THE PULSE, SEPARATING THE IONS ACCORDING TO THEIR MASS, AND SELECTIVELY DETECTING SEPARATED IONS OF THE MASS OF AN IMPURITY.
Claim 2
Independent Claim
119 words
A METHOD OF DETECTING SMALL IMPURITIES IN SAMPLES OF CERTAIN GASES WHEN THE IONIZATION POTENTIAL OF THE IMPURITY IS LESS THAN THE IONIZATION POTENTIAL OF THE MAIN PART OF THE GAS, SAID METHOD COMPRISING APPLYING AN ENERGY PULSE TO THE GAS TO IONIZE A FRACTION OF THE GAS, DISCONTINUING SAID PUSLE TO PERMIT THE TRANSFER OF CHARGE FROM THE IONS OF THE MAIN PART OF THE GAS TO THE MORE EASILY IONIZED IMPURITY SO AS TO INCREASE THE NUMBER OF IMPURITY IONS AT THE EXPENSE OF THE IONS OF THE MAIN PART OF THE GAS DURING THE INTERVAL FOLLOWING THE PULSE, SEPARATING THE IONS ACCORDING TO THEIR MASS, AND SELECTIVELY DETECTING SEPARATED IONS OF THE MASS OF AN IMPURITY.
Claim 3
Dependent Claim
122 words
AN ULTRA-SENSITIVE MASS SPECTROMETER FOR DETECTING SMALL IMPURITIES IN CERTAIN GASES WHEN THE IONIZATION POTENTIAL OF THE IMPURITY IS LESS THAN THE IONIZATION POTENTIAL OF THE MAIN PART OF THE GAS, SAID SPECTROMETER COMPRISING AN ION SOURCE, SAID ION SOURCE INCLUDING MEANS FOR APPLYING AN ENERGY PULSE SO THE GAS IN THE ION SOURCE OT IONIZE A FRACTION THEREOF AND FOR DISCONTINUING SAID PULSE TO PERMIT THE TRANSFER OF CHARGE FROM THE IONS OF THE MAIN PART OF THE GAS TO THE MOVE EASILY IONIZED IMPURITY SO AS TO INCREASE THE NUMBER OF IMPURITY IONS AT THE EXPENSE OF THE IONS OF THE MAIN PART OF THE GAS DURING THE INTERVAL FOLLOWING THE PULSE; MEANS FOR DIRECTING IONS PRODUCED IN THE ION
Claim 4
Dependent Claim
122 words
AN ULTRA-SENSITIVE MASS SPECTROMETER FOR DETECTING SMALL IMPURITIES IN CERTAIN GASES WHEN THE IONIZATION POTENTIAL OF THE IMPURITY IS LESS THAN THE IONIZATION POTENTIAL OF THE MAIN PART OF THE GAS, SAID SPECTROMETER COMPRISING AN ION SOURCE, SAID ION SOURCE INCLUDING MEANS FOR APPLYING AN ENERGY PULSE SO THE GAS IN THE ION SOURCE OT IONIZE A FRACTION THEREOF AND FOR DISCONTINUING SAID PULSE TO PERMIT THE TRANSFER OF CHARGE FROM THE IONS OF THE MAIN PART OF THE GAS TO THE MOVE EASILY IONIZED IMPURITY SO AS TO INCREASE THE NUMBER OF IMPURITY IONS AT THE EXPENSE OF THE IONS OF THE MAIN PART OF THE GAS DURING THE INTERVAL FOLLOWING THE PULSE; MEANS FOR DIRECTING IONS PRODUCED IN THE ION
References Cited (Backward Citations)
US2764691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |