US1670437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically-heated steam boiler
Assignee: MOLL Manufacturing Co
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Filing: 1926-04-08
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Granted: 1928-05-22
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Expires: 1946-04-08
Abstract
No abstract record available.
Inventors
- 👤 Carleton W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:56
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/46; F; F22; F22B; F22B1/00; F22B1/28; F22B1/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-05-22 | 1931-11-21 | 1932-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-22 | 1935-11-21 | 1936-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-22 | 1939-11-21 | 1940-05-22 | $7700.00 | Window Closed / Lapsed |