Patent US2779015A successfully refreshed from Google Patents.
US2779015A
Expired / Lapsed
US
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Depth indicator for conductive liquid
Assignee: Individual
•
Filing: 1955-04-11
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Granted: 1957-01-22
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Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Walker Brooks
- 👤 Henry J Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:24
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/0231; B60R16/0232; G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/241; G01F23/243
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |