US62823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in the manufacture of gas
Assignee: —
•
Filing: —
•
Granted: 1867-03-12
•
Expires: 1884-03-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:04
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933; Y; Y10; Y10S; Y10S48/00; Y10S48/04
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) | 1870-03-11 | 1870-09-10 | 1871-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-03-11 | 1874-09-10 | 1875-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-03-11 | 1878-09-10 | 1879-03-12 | $7700.00 | Window Closed / Lapsed |