US2639615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barometric measurement of elevation
Assignee: ExxonMobil Oil Corp
•
Filing: 1947-03-11
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Granted: 1953-05-26
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Expires: 1967-03-11
Abstract
No abstract record available.
Inventors
- 👤 Dayton H Clewell
- 👤 Carl F Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:52
CPC Classifications
G; G01; G01L; G01L11/00; G01L11/004; G01L11/008; G01L19/00; G01L19/08; G01L19/086; G01L9/00; G01L9/0091; G01L9/0097
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |