US2546550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark ignition apparatus
Assignee: ZF International UK Ltd
•
Filing: 1950-01-06
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Granted: 1951-03-27
•
Expires: 1970-01-06
Abstract
No abstract record available.
Inventors
- 👤 Laird John Andrew
- 👤 Morris Dennis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:39
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/001; F02P15/003; F02P3/00; F02P3/06; F02P3/08; F02P3/0876; F02P3/0884
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) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |