US2685447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic record changer for phonographs
Assignee: RISTAUCRAT Inc
•
Filing: 1949-08-27
•
Granted: 1954-08-03
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Arnold E Ristau
- 👤 Alfred G Ristau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:08
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/58; G11B3/5809; G11B3/5881; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19614
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |