US2668718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic letterhead
Assignee: Int Electronics Co
•
Filing: 1947-03-27
•
Granted: 1954-02-09
•
Expires: 1967-03-27
Abstract
No abstract record available.
Inventors
- 👤 Roberts Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US406568A
Cited
US1146387A
Cited
US1949840A
Cited
GB394310A
Cited
FR783581A
Cited
US2043884A
Cited
US2152296A
Cited
US2258106A
Cited
US2229293A
Cited
US2427383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |