US2817030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionisation manometers
Assignee: International Standard Electric Corp
•
Filing: 1952-03-25
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Granted: 1957-12-17
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Expires: 1972-03-25
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
- 👤 Cutting Alan Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:49
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/06; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1004012A
Cited
US2397071A
Cited
GB555134A
Cited
US2425533A
Cited
US2457781A
Cited
US2516704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |