US2459700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve
Assignee: Individual
•
Filing: 1944-06-07
•
Granted: 1949-01-18
•
Expires: 1964-06-07
Abstract
No abstract record available.
Inventors
- 👤 Harper Esther Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:21
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/006; G05D23/00; G05D23/01; G05D23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768487A
Cited
US649641A
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US869323A
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US1083467A
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US1907976A
Cited
US1910237A
Cited
US1834368A
Cited
US1909469A
Cited
US1987666A
Cited
US2347196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |