US2558004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic level
Assignee: Individual
•
Filing: 1949-07-14
•
Granted: 1951-06-26
•
Expires: 1969-07-14
Abstract
No abstract record available.
Inventors
- 👤 Charles E Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6918; Y10T137/6954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US277037A
Cited
US397294A
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US630856A
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FR338880A
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US1009490A
Cited
US1566174A
Cited
US1567483A
Cited
US2398805A
Cited
US2438188A
Cited
US2481847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |