Patent US1409535A successfully refreshed from Google Patents.
US1409535A
Expired / Lapsed
US
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Differential gearing
Assignee: Individual
•
Filing: 1920-03-19
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Granted: 1922-03-14
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Expires: 1940-03-19
Abstract
No abstract record available.
Inventors
- 👤 Frank V Elbertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:48
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/06; F16H48/10; F16H48/11; F16H2048/106
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) | 1925-03-13 | 1925-09-12 | 1926-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-03-13 | 1929-09-12 | 1930-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-03-13 | 1933-09-12 | 1934-03-14 | $7700.00 | Window Closed / Lapsed |