US20846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved punch for perforating metal
Assignee: —
•
Filing: —
•
Granted: 1858-07-06
•
Expires: 1875-07-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:44
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10S; Y10S279/00; Y10S279/907; Y10T; Y10T279/00; Y10T279/10; Y10T279/1037; Y10T279/1066; Y10T279/17; Y10T279/17411; Y10T279/17461; Y10T83/00; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9428; Y10T83/9457; Y10T83/9473; Y10T83/9476
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) | 1861-07-05 | 1862-01-04 | 1862-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1865-07-05 | 1866-01-04 | 1866-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1869-07-05 | 1870-01-04 | 1870-07-06 | $7700.00 | Window Closed / Lapsed |