Patent US1731972A successfully refreshed from Google Patents.
US1731972A
Expired / Lapsed
US
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Variable-speed transmission
Assignee: Individual
•
Filing: 1928-10-08
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Granted: 1929-10-15
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Expires: 1948-10-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Fay
- 👤 James C Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:26
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/58; F16H3/62; F16H3/66; F16H3/663
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) | 1932-10-14 | 1933-04-15 | 1933-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-14 | 1937-04-15 | 1937-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-14 | 1941-04-15 | 1941-10-15 | $7700.00 | Window Closed / Lapsed |