Patent US120824A successfully refreshed from Google Patents.
US120824A
Expired / Lapsed
US
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Improvement in gas-machines
Assignee: —
•
Filing: —
•
Granted: 1871-11-14
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Expires: 1888-11-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
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) | 1874-11-13 | 1875-05-15 | 1875-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1878-11-13 | 1879-05-15 | 1879-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1882-11-13 | 1883-05-15 | 1883-11-14 | $7700.00 | Window Closed / Lapsed |