Patent US27401A successfully refreshed from Google Patents.
US27401A
Expired / Lapsed
US
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Improvement in solidified fuel from coal-dust
Assignee: —
•
Filing: —
•
Granted: 1860-03-06
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Expires: 1877-03-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C10L5/06; C10L5/10; Y; Y10; Y10S; Y10S524/00; Y10S524/916; Y10S526/00; Y10S526/93; Y10S526/936; Y10S623/00; Y10S623/924
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) | 1863-03-06 | 1863-09-05 | 1864-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-03-06 | 1867-09-05 | 1868-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-03-06 | 1871-09-05 | 1872-03-06 | $7700.00 | Window Closed / Lapsed |