Patent US3528166A successfully refreshed from Google Patents.
Patent US1609045A successfully refreshed from Google Patents.
US1609045A
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Method of cutting die-roll matrices
Assignee: WITHEROW STEEL Co
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Filing: 1925-10-06
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Granted: 1926-11-30
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Expires: 1945-10-06
Abstract
No abstract record available.
Inventors
- 👤 William P Witherow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/026; B23; B23C; B23C3/00; B23C3/28; B23C3/34; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303752; Y10T409/303808; Y10T409/304424
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) | 1929-11-29 | 1930-05-31 | 1930-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-29 | 1934-05-31 | 1934-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-29 | 1938-05-31 | 1938-11-30 | $7700.00 | Window Closed / Lapsed |