US3022400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way solenoid
Assignee: Individual
•
Filing: 1957-06-27
•
Granted: 1962-02-20
•
Expires: 1977-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ahlefeldt Rolf S Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:25
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/1615; H01F7/121; H01F7/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341981A
Cited
US965877A
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US1120414A
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US1133787A
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US1171021A
Cited
US1780939A
Cited
US2085549A
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DE665565C
Cited
US2170694A
Cited
US2268882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |