Patent US3550984A successfully refreshed from Google Patents.
US3550984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape transport mechanism
Assignee: Northrop Grumman Corp
•
Filing: 1967-08-07
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Granted: 1970-12-29
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Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Douglas A Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/40; G11B15/44; G11B27/00; G11B27/10
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) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |