US2492465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive device
Assignee: HAMMEL DAHL Co
•
Filing: 1947-05-16
•
Granted: 1949-12-27
•
Expires: 1967-05-16
Abstract
No abstract record available.
Inventors
- 👤 Edward T Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:26
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1262; F16K31/1264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US679898A
Cited
US1062300A
Cited
US1620322A
Cited
US2044392A
Cited
US2047581A
Cited
US2202351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |