US2992447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head cleaning tape
Assignee: Individual
•
Filing: 1957-04-09
•
Granted: 1961-07-18
•
Expires: 1977-04-09
Abstract
No abstract record available.
Inventors
- 👤 Iv John Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/41
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1234852A
Cited
US1208064A
Cited
US1296779A
Cited
US1823689A
Cited
US2606409A
Cited
US2800215A
Cited
US2819186A
Cited
US2886841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |