Patent US4083653A successfully refreshed from Google Patents.
Patent US2996942A successfully refreshed from Google Patents.
US2996942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboards and accessories
Assignee: Individual
•
Filing: 1956-05-15
•
Granted: 1961-08-22
•
Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Harold A Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:38
CPC Classifications
G; G10; G10C; G10C3/00; G10C3/12; G10C3/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US297222A
Cited
US427826A
Cited
US446289A
Cited
US718691A
Cited
US904730A
Cited
GB190813674A
Cited
US1107783A
Cited
US1199367A
Cited
US1657169A
Cited
US2505608A
Cited
US2562670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |