Patent US743737A successfully refreshed from Google Patents.
US743737A
Expired / Lapsed
US
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Tapping-machine.
Assignee: VARLEY DUPLEX MAGNET CO
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Filing: 1903-06-03
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Granted: 1903-11-10
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Expires: 1923-06-03
Abstract
No abstract record available.
Inventors
- 👤 Rollin Carroll Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:35
CPC Classifications
B; B23; B23B; B23B41/00; B23B41/12; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/375; Y10T408/38; Y10T408/3806; Y10T408/3844
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) | 1906-11-09 | 1907-05-11 | 1907-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-11-09 | 1911-05-11 | 1911-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-11-09 | 1915-05-11 | 1915-11-10 | $7700.00 | Window Closed / Lapsed |