US3033384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic draft gear
Assignee: National Castings Co
•
Filing: 1959-12-07
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Granted: 1962-05-08
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Andrey L Zanow
- 👤 Catherine A Overbeke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48; F16F9/486; B; B61; B61G; B61G11/00; B61G11/12; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |