US2791907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating stages of fluid depth of water in wells
Assignee: GRINER
•
Filing: 1954-05-19
•
Granted: 1957-05-14
•
Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Gladys M Griner
- 👤 Carl J Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0038; E; E21; E21B; E21B47/00; E21B47/04; E21B47/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1723173A
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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) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |