Patent US2904723A successfully refreshed from Google Patents.
US2904723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition contrivance for combustion engines
Assignee: Individual
•
Filing: 1955-10-26
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Granted: 1959-09-15
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Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Altrogge Wilhelm
- 👤 Willutzky Kurt
- 👤 Frungel Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1839004A
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US1296006A
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US2276966A
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GB574775A
Cited
US2378705A
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US2544477A
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US2571789A
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US2685050A
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US2584507A
Cited
US2552212A
Cited
US2814659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |