Patent US485272A successfully refreshed from Google Patents.
US51328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in bridges
Assignee: —
•
Filing: 1865-12-05
•
Granted: 1865-12-05
•
Expires: 1885-12-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:39
CPC Classifications
E; E01; E01D; E01D4/00; E04; E04B; E04B1/00; E04B1/32; E04B1/3205; E01D2101/00; E01D2101/20; E01D2101/22; E01D2101/24; E01D2101/26; E01D2101/268
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) | 1868-12-04 | 1869-06-05 | 1869-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1872-12-04 | 1873-06-05 | 1873-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1876-12-04 | 1877-06-05 | 1877-12-05 | $7700.00 | Window Closed / Lapsed |