US8324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in self-acting blow-pipe lamps
Assignee: —
•
Filing: —
•
Granted: 1851-08-26
•
Expires: 1868-08-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:43
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/12; A; A01; A01G; A01G13/00; A01G13/06
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) | 1854-08-25 | 1855-02-24 | 1855-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1858-08-25 | 1859-02-24 | 1859-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1862-08-25 | 1863-02-24 | 1863-08-26 | $7700.00 | Window Closed / Lapsed |