US1496306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit-closing device for oil-level indicators
Assignee: Individual
•
Filing: 1921-02-26
•
Granted: 1924-06-03
•
Expires: 1941-02-26
Abstract
No abstract record available.
Inventors
- 👤 Louis A Duhamel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/60
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) | 1927-06-03 | 1927-12-03 | 1928-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-06-03 | 1931-12-03 | 1932-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-06-03 | 1935-12-03 | 1936-06-03 | $7700.00 | Window Closed / Lapsed |