US3487208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving sensitivity and resolution of a mass spectrometer
Assignee: United States Department of the Air Force
•
Filing: 1967-06-01
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Granted: 1969-12-30
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Expires: 1987-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jean H Futrell
- 👤 Fred P Abramson
- 👤 Carroll D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/28; H01J49/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3155826A
Cited
US3233099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |