Patent US1802668A successfully refreshed from Google Patents.
US1802668A
Expired / Lapsed
US
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Self-centering drive screw
Assignee: Individual
•
Filing: 1930-04-09
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Granted: 1931-04-28
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Expires: 1950-04-09
Abstract
No abstract record available.
Inventors
- 👤 Frank E Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:23
CPC Classifications
F; F16; F16B; F16B15/00; F16B15/06; F16B25/00; F16B25/001; F16B25/0015; F16B25/0036; F16B25/0042; F16B25/0068
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) | 1934-04-27 | 1934-10-27 | 1935-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-27 | 1938-10-27 | 1939-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-27 | 1942-10-27 | 1943-04-28 | $7700.00 | Window Closed / Lapsed |