US8670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
blasdell
Assignee: —
•
Filing: —
•
Granted: 1852-01-20
•
Expires: 1869-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:47
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/10; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/193
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) | 1855-01-19 | 1855-07-21 | 1856-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1859-01-19 | 1859-07-21 | 1860-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1863-01-19 | 1863-07-21 | 1864-01-20 | $7700.00 | Window Closed / Lapsed |