US2988604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording and reproducing system
Assignee: JAMES A FRASER
•
Filing: 1954-04-20
•
Granted: 1961-06-13
•
Expires: 1974-04-20
Abstract
No abstract record available.
Inventors
- 👤 William M Nye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE585258C
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US1166925A
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US2431646A
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US2410569A
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US2519725A
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US2542506A
Cited
US2633503A
Cited
DE828450C
Cited
GB688567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |