Patent US494819A successfully refreshed from Google Patents.
US494819A
Expired / Lapsed
US
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Doubling and shearing machine
Assignee: —
•
Filing: —
•
Granted: 1893-04-04
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Expires: 1910-04-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:14
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/36; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/576; Y10T83/5769; Y10T83/5778
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) | 1896-04-03 | 1896-10-03 | 1897-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-04-04 | 1900-10-04 | 1901-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-04-04 | 1904-10-04 | 1905-04-05 | $7700.00 | Window Closed / Lapsed |