Patent US2944152A successfully refreshed from Google Patents.
US2944152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire detection
Assignee: McGraw Edison Co
•
Filing: 1955-06-30
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Granted: 1960-07-05
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Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 John B Johnson
- 👤 Neal T Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:50
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08; G; G01; G01T; G01T7/00; G01T7/12; G01T7/125; G08; G08B; G08B17/00; G08B17/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2712088A
Cited
US2456968A
Cited
US2522902A
Cited
US2695364A
Cited
US2671873A
Cited
US2676270A
Cited
US2744697A
Cited
US2721276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |