US3501978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential drive mechanism
Assignee: DIGILOG ELECTRONICS CORP
•
Filing: 1967-07-10
•
Granted: 1970-03-24
•
Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Ferrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:20
CPC Classifications
F; F16; F16H; F16H49/00; F16H49/001; Y; Y10; Y10T; Y10T74/00; Y10T74/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB249805A
Cited
US2849897A
Cited
US3187605A
Cited
US3178963A
Cited
US3206703A
Cited
US3363484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |