Patent US2157523A successfully refreshed from Google Patents.
US2157523A
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Coupling device
Assignee: Telefunken AG
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Filing: 1935-09-09
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Granted: 1939-05-09
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Expires: 1955-09-09
Abstract
No abstract record available.
Inventors
- 👤 Buschbeck Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:00
CPC Classifications
H; H03; H03H; H03H7/00; H03H11/00; H03H11/02; H03H11/36; H03H11/367; H03H2/00; H03H2/005; H03H2/006
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) | 1942-05-08 | 1942-11-07 | 1943-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-08 | 1946-11-07 | 1947-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-08 | 1950-11-07 | 1951-05-09 | $7700.00 | Window Closed / Lapsed |