US3515937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark ignition apparatus
Assignee: Lucas Support Services Ltd
•
Filing: 1968-11-05
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Granted: 1970-06-02
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Expires: 1988-11-05
Abstract
No abstract record available.
Inventors
- 👤 Keith Douglas Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:00
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/06; F02P3/08; F02P3/0876; F02P3/0884; F02C; F02C7/00; F02C7/26; F02C7/264; F02C7/266; F02P15/00; F02P15/001; F02P15/003; F02P9/00; F02P9/002; F02P9/007; F02P17/00; F02P2017/003
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) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |