Patent US1390974A successfully refreshed from Google Patents.
US1390974A
Expired / Lapsed
US
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Apparatus for stirring and feeding of pulverulent fuel in furnaces for locomotives or the like
Assignee: MOTALA VERKST S NYA AB
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Filing: 1918-01-21
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Granted: 1921-09-13
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Expires: 1938-01-21
Abstract
No abstract record available.
Inventors
- 👤 Porat Karl Hjalmar Vilhelm Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:10
CPC Classifications
F; F23; F23K; F23K3/00; F23K2203/00; F23K2203/008
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) | 1924-09-12 | 1925-03-14 | 1925-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-09-12 | 1929-03-14 | 1929-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-09-12 | 1933-03-14 | 1933-09-13 | $7700.00 | Window Closed / Lapsed |