Patent US3505984A successfully refreshed from Google Patents.
US3505984A
Expired / Lapsed
US
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Fuel injection systems for internal combustion engines
Assignee: British Internal Combustion Engine Research Institute
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Filing: 1968-06-04
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Granted: 1970-04-14
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Expires: 1988-06-04
Abstract
No abstract record available.
Inventors
- 👤 Wilfred Percival Mansfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:50
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/20; F02M59/34; F02D; F02D1/00; F02D1/16; F02D1/18; F02D1/183; F02M41/00; F02M41/08; F02M41/14; F02M41/1433; F02M47/00; F02M47/02; F02M59/02; F02M59/10; F02M59/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |