Patent US1643469A successfully refreshed from Google Patents.
US1643469A
Expired / Lapsed
US
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Liquid-level gauge
Assignee: Individual
•
Filing: 1920-12-03
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Granted: 1927-09-27
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Expires: 1940-12-03
Abstract
No abstract record available.
Inventors
- 👤 Donald H Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:19
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1930-09-26 | 1931-03-28 | 1931-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-09-26 | 1935-03-28 | 1935-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-09-26 | 1939-03-28 | 1939-09-27 | $7700.00 | Window Closed / Lapsed |