US3397590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical gear drive mechanism with anti-backlash means
Assignee: Tektronix Inc
•
Filing: 1967-03-02
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Granted: 1968-08-20
•
Expires: 1987-03-02
Abstract
No abstract record available.
Inventors
- 👤 Leon A Prentice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:37
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/18; F16H57/00; F16H57/12; F16H1/125; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19698
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2903894A
Cited
US3267749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |