US2551526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple pressure recorder
Assignee: RTX Corp
•
Filing: 1944-01-22
•
Granted: 1951-05-01
•
Expires: 1964-01-22
Abstract
No abstract record available.
Inventors
- 👤 Paul J Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:19
CPC Classifications
G; G01; G01M; G01M9/00; G01M9/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2243398A
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US2237070A
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US2332725A
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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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |