US2779908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for reducing electro-magnetic coupling
Assignee: Westinghouse Air Brake Co
•
Filing: 1952-04-12
•
Granted: 1957-01-29
•
Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 Paul N Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:46
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q1/521; H01Q1/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2511897A
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US1173094A
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US2259788A
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US2451596A
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US2522035A
Cited
US2435043A
Cited
US2488370A
Cited
US2597518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |