US1618870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of engines and machines
Assignee: Bristol Aeroplane Co Ltd
•
Filing: 1924-04-09
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Granted: 1927-02-22
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Expires: 1944-04-09
Abstract
No abstract record available.
Inventors
- 👤 Fedden Alfred Hubert Roy
- 👤 Butler Leonard Frederic George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:40
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/06; F16C3/14; F16N; F16N39/00; F16N39/06; H; H01; H01H; H01H9/00; H01H9/10; H01H9/102; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2185
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) | 1930-02-21 | 1930-08-23 | 1931-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-21 | 1934-08-23 | 1935-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-21 | 1938-08-23 | 1939-02-22 | $7700.00 | Window Closed / Lapsed |