US70388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved method of covering- steam-generators
Assignee: —
•
Filing: —
•
Granted: 1867-11-05
•
Expires: 1884-11-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:58
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; Y; Y10; Y10S; Y10S425/00; Y10S425/13
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) | 1870-11-04 | 1871-05-06 | 1871-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-11-04 | 1875-05-06 | 1875-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-11-04 | 1879-05-06 | 1879-11-05 | $7700.00 | Window Closed / Lapsed |