US1256372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-speed gear.
Assignee: Napier Turbochargers Ltd
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Filing: 1916-05-01
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Granted: 1918-02-12
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Expires: 1936-05-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur John Rowledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H2200/00; F16H2200/20; F16H2200/2002; F16H2200/2012
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) | 1921-02-11 | 1921-08-13 | 1922-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-02-11 | 1925-08-13 | 1926-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-02-11 | 1929-08-13 | 1930-02-12 | $7700.00 | Window Closed / Lapsed |