US2504969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency apparatus having two work-engaging electrodes and one adjustable electrode
Assignee: Girdler Corp
•
Filing: 1946-07-06
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Granted: 1950-04-25
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Expires: 1966-07-06
Abstract
No abstract record available.
Inventors
- 👤 Carl E Eilsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:09
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1700408A
Cited
US1877918A
Cited
US2204617A
Cited
US2079708A
Cited
US2294480A
Cited
US2324068A
Cited
GB556292A
Cited
US2396004A
Cited
US2436732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |