US2464376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pi type resistance capacitance filter unit
Assignee: F W SICKLES Co
•
Filing: 1948-03-20
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Granted: 1949-03-15
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Expires: 1968-03-20
Abstract
No abstract record available.
Inventors
- 👤 Cohen Monte
- 👤 Frederick G Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/40; H01C; H01C13/00; H03; H03H; H03H1/00; H03H1/02; H03H2001/0021; H03H2001/0042
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) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |