US3548596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-geared single screw system
Assignee: JFE Engineering Corp
•
Filing: 1968-11-27
•
Granted: 1970-12-22
•
Expires: 1988-11-27
Abstract
No abstract record available.
Inventors
- 👤 Masaaki Mizushina
- 👤 Koji Toyota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:48
CPC Classifications
F; F02; F02D; F02D25/00; F02D25/02; B; B63; B63H; B63H21/00; B63H21/21; B63H23/00; B63H23/02; B63H23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20487E
Cited
US2173913A
Cited
US2105089A
Cited
US2258462A
Cited
US2374276A
Cited
US2382847A
Cited
US3365882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |