US3229355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a magnetic transducer head
Assignee: International Business Machines Corp
•
Filing: 1962-01-02
•
Granted: 1966-01-18
•
Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Hluszko John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:13
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/21; G11B5/10; G11B5/147; G11B5/1475; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49048; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1254664A
Cited
DE924059C
Cited
US2734941A
Cited
US2883818A
Cited
GB827335A
Cited
US2999906A
Cited
US3086087A
Cited
GB874338A
Cited
GB870107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |