Patent US3588495A successfully refreshed from Google Patents.
US3588495A
Expired / Lapsed
US
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Mass spectrometers having adjustable beam defining slits
Assignee: Associated Electrical Industries Ltd
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Filing: 1969-05-22
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Granted: 1971-06-28
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Expires: 1989-05-22
Abstract
Abstract A MASS SPECTROMETER HAVING ANION SOURCE, AN ANALYZER, A COLLECTOR, AND SLITS ALONG A PATH OF ION TRAVEL FROM THE SOURCE TO THE COLLECTOR. THE SLITS ARE ADJUSTABLE TO HIGH AND LOW RESOLUTION POSITIONS. CIRCUITRY IS PROVIDED SUCH THAT THE ADJUSTMENT OF THE SLITS AND SCANNING OF THE ANALYZER OCCURS IN A COORDINATED FASHION AND THE ANALYZER IS SCANNED WHILE A SLIT IS MAINTAINED IN EACH OF ITS ADJUSTED POSITIONS.
Inventors
- 👤 John Stephen Halliday
- 👤 Thomas Oliver Merren
- 👤 John Steward Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:10
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/06; H01J49/067; H01J49/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |