US2989705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit hum control
Assignee: Webcor Inc
•
Filing: 1956-12-31
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Granted: 1961-06-20
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Sam S Romano
- 👤 Rudolph R Starai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:28
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0216; H05K1/023; H05K1/0234; H04; H04B; H04B15/00; H04B15/005; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2201/10; H05K2201/10007; H05K2201/10022; H05K2201/10196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1630346A
Cited
FR479563A
Cited
US2206638A
Cited
US2474988A
Cited
US2411362A
Cited
US2546025A
Cited
US2718623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |