US2639867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape reel mounting
Assignee: AMPEX ELECTRIC Corp
•
Filing: 1949-03-21
•
Granted: 1953-05-26
•
Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Harold W Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:28
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/674
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1237496A
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US1328696A
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US1436790A
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US1637437A
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US1455110A
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US1669248A
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US2051259A
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GB482536A
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US2350549A
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US2507457A
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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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |