Patent US201790A successfully refreshed from Google Patents.
US201790A
Expired / Lapsed
US
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Improvement in screw-cutting dies
Assignee: —
•
Filing: —
•
Granted: 1878-03-26
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Expires: 1895-03-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:21
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/107; B23B31/1071; B25; B25B; B25B21/00; B25B21/007; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8598; Y10T408/94; Y10T408/95
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) | 1881-03-25 | 1881-09-24 | 1882-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-03-25 | 1885-09-24 | 1886-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-03-25 | 1889-09-24 | 1890-03-26 | $7700.00 | Window Closed / Lapsed |