US2873703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for preventing hopper fires in coal furnaces
Assignee: V & E Products Inc
•
Filing: 1955-06-02
•
Granted: 1959-02-17
•
Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 George E Valentine
- 👤 Joseph H Eubanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
F; F23; F23M; F23M11/00; F23K; F23K3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270073A
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US878658A
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US918210A
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US1100003A
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US1106427A
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US1144502A
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US1219493A
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US1278325A
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US1414722A
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US2218330A
Cited
US2301014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |