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US2774936A
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Ionisation manometers
Assignee: International Standard Electric Corp
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Filing: 1953-07-27
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Granted: 1956-12-18
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Expires: 1973-07-27
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
- 👤 Brisbane Alan Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2576330A
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US2490468A
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US2457781A
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US2652716A
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US2622208A
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US2648818A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |