Patent US2531312A successfully refreshed from Google Patents.
US2531312A
Expired / Lapsed
US
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Oscillator circuit arrangement
Assignee: Hartford National Bank and Trust Co
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Filing: 1948-04-06
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Granted: 1950-11-21
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Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Carel Jan Van Loon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/26; H03; H03B; H03B5/00; H03B5/08; H03B5/10; H03D; H03D7/00; H03D7/06; H03D7/08
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |