Patent EP0682910A1 successfully refreshed from Google Patents.
US2564562A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1945-11-27
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Granted: 1951-08-14
•
Expires: 1965-11-27
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Chess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/02; H04R1/00; H04R1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711410A
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US1803275A
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US1980171A
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US2105010A
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US2045427A
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US2177629A
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US2121779A
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US2283285A
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US2207539A
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US2414489A
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US2405226A
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US2448365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |