US3426453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic display device
Assignee: International Business Machines Corp
•
Filing: 1967-05-22
•
Granted: 1969-02-11
•
Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Robert P Dingwall
- 👤 Haik Marcar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2589601A
Cited
US3140553A
Cited
US3103751A
Cited
USRE25822E
Cited
US3214171A
Cited
US3295238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |