US2620198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor jack
Assignee: GEN FLUID MACHINERY Co
•
Filing: 1948-01-31
•
Granted: 1952-12-02
•
Expires: 1968-01-31
Abstract
No abstract record available.
Inventors
- 👤 Johnston Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:47
CPC Classifications
B; B66; B66F; B66F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US659189A
Cited
US917910A
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US926131A
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US1163485A
Cited
GB191516727A
Cited
US1614764A
Cited
US1674813A
Cited
US1591535A
Cited
US2037700A
Cited
US2085657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |