US3423658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive system for a step motor
Assignee: Ricoh Printing Systems America Inc
•
Filing: 1965-08-24
•
Granted: 1969-01-21
•
Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 Gordon B Barrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/04; B41J15/06; H; H02; H02P; H02P8/00; H02P8/32; Y; Y10; Y10S; Y10S400/00; Y10S400/902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3353076A
Cited
US3345547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |