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Patent US2361282A successfully refreshed from Google Patents.
US2361282A
Expired / Lapsed
US
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Push-pull electron tube system
Assignee: Philco Radio and Television Corp
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Filing: 1941-11-13
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Granted: 1944-10-24
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Expires: 1961-11-13
Abstract
No abstract record available.
Inventors
- 👤 Walter E Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:07
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03F3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-10-24 | 1948-04-24 | 1948-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-10-24 | 1952-04-24 | 1952-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-10-24 | 1956-04-24 | 1956-10-24 | $7700.00 | Window Closed / Lapsed |