US2521760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric high-frequency oscillation generator
Assignee: International Standard Electric Corp
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Filing: 1947-08-19
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Granted: 1950-09-12
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Expires: 1967-08-19
Abstract
No abstract record available.
Inventors
- 👤 Starr Arthur Tisso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12; H01J25/34; H01J25/36; H01J25/38; H03B5/02; H03B9/00; H03B9/01; H03C; H03C3/00; H03C3/30; H03C7/00; H03C7/02; H03L; H03L7/00; H03L7/02; H03L7/04
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |