US2940761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Length and correction marker in dictating machine
Assignee: McGraw Edison Co
•
Filing: 1955-10-27
•
Granted: 1960-06-14
•
Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Forest Louis Z La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1754503A
Cited
US2154029A
Cited
US2148861A
Cited
US2184914A
Cited
US2613939A
Cited
US2567318A
Cited
US2628841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |