Patent US82181A successfully refreshed from Google Patents.
US82181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in paper-fasteners
Assignee: —
•
Filing: —
•
Granted: 1868-09-15
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Expires: 1885-09-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:17
CPC Classifications
B; B42; B42F; B42F3/00; Y; Y10; Y10S; Y10S411/00; Y10S411/92
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) | 1871-09-15 | 1872-03-16 | 1872-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-09-15 | 1876-03-16 | 1876-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-09-15 | 1880-03-16 | 1880-09-15 | $7700.00 | Window Closed / Lapsed |