US2471240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat actuated device
Assignee: Automatic Sprinkler Corp
•
Filing: 1945-02-03
•
Granted: 1949-05-24
•
Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 Harry N Rider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:53
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/48; G01K5/56; G01K5/62; G01K5/64; G01K5/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US416947A
Cited
US1657353A
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US1633908A
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US1788048A
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US1897155A
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US2146731A
Cited
US2239540A
Cited
US2252946A
Cited
US2318480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |