US2840940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical reading and writing tablet
Assignee: Individual
•
Filing: 1956-11-05
•
Granted: 1958-07-01
•
Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 John R Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:41
CPC Classifications
G; G09; G09B; G09B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE197818C
Cited
DE182269C
Cited
US961062A
Cited
US1326396A
Cited
US1471286A
Cited
US1585342A
Cited
US1963120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |