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Patent US2979336A successfully refreshed from Google Patents.
US2979336A
Expired / Lapsed
US
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Turntables for automatic recordchanging phonographs and driving mechanism therefor
Assignee: Individual
•
Filing: 1956-08-15
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Granted: 1961-04-11
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Expires: 1976-08-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Ristau
- 👤 Arnold E Ristau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:11
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/60; G11B3/02; G11B3/08; G11B3/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US908778A
Cited
US1395035A
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US1451282A
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GB198698A
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US1843140A
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US1924620A
Cited
US1904490A
Cited
DE598584C
Cited
US2068449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |