Patent US206642A successfully refreshed from Google Patents.
US206642A
Expired / Lapsed
US
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Improvement in apparatus for preparing gaseous fuel
Assignee: —
•
Filing: —
•
Granted: 1878-07-30
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Expires: 1895-07-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/78; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87652
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) | 1881-07-29 | 1882-01-28 | 1882-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-07-29 | 1886-01-28 | 1886-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-07-29 | 1890-01-28 | 1890-07-30 | $7700.00 | Window Closed / Lapsed |