US2490785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid contact tilt indicating switch
Assignee: Individual
•
Filing: 1948-01-08
•
Granted: 1949-12-13
•
Expires: 1968-01-08
Abstract
No abstract record available.
Inventors
- 👤 Vany Arthur S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
G; G01; G01C; G01C9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US830730A
Cited
US670149A
Cited
US1133000A
Cited
GB191400441A
Cited
GB128338A
Cited
GB188696A
Cited
US2038669A
Cited
US2286014A
Cited
US2319932A
Cited
US2402396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |