US2821445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pistons of compression ignition engines
Assignee: L Gardner and Sons Ltd
•
Filing: 1955-06-02
•
Granted: 1958-01-28
•
Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 Gardner Joseph Hugh Stott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:13
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1057063A
Cited
US2044854A
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US1768815A
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US1768816A
Cited
FR757673A
Cited
GB428051A
Cited
US2313202A
Cited
GB564660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |