US2623389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: HET NAT LUCHTVAARTLABORATORIUM
•
Filing: 1948-07-23
•
Granted: 1952-12-30
•
Expires: 1968-07-23
Abstract
No abstract record available.
Inventors
- 👤 Teunis Van Oosterom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/103; G01F1/12; G01F1/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE186574C
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US1277464A
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US1768553A
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US1957681A
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US2176502A
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US2204463A
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US2411613A
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US2406723A
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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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |