US3499515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular electrical keyboard
Assignee: Synergistics Inc
•
Filing: 1967-12-11
•
Granted: 1970-03-10
•
Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Michael E Mikrut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:46
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/58; H01H13/00; H01H13/70; H01R; H01R4/00; H01R4/24; H01R4/2404; H01R4/2406; H01R4/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2469754A
Cited
US2665336A
Cited
US2932816A
Cited
US3129418A
Cited
US3196219A
Cited
US3351817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |