US3407660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level determining device
Assignee: ROYLYN Inc
•
Filing: 1967-01-17
•
Granted: 1968-10-29
•
Expires: 1987-01-17
Abstract
No abstract record available.
Inventors
- 👤 Nusbaum Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/58; G01F23/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1162916A
Cited
US1531200A
Cited
US1525294A
Cited
US2129984A
Cited
US2117933A
Cited
US2738675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |