Patent US2870635A successfully refreshed from Google Patents.
US2870635A
Expired / Lapsed
US
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Compensated water level indicator
Assignee: Individual
•
Filing: 1955-10-20
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Granted: 1959-01-27
•
Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Justus T Vollbrecht
- 👤 Milton S Umbenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1699075A
Cited
US2337171A
Cited
US2334463A
Cited
US2347860A
Cited
US2500443A
Cited
US2747404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |