Patent US4053540A successfully refreshed from Google Patents.
Patent US617753A successfully refreshed from Google Patents.
Patent US3238992A successfully refreshed from Google Patents.
Patent US2620198A successfully refreshed from Google Patents.
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 19:30
CPC Classifications
B; B66; B66F; B66F5/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US659189A
Cited
US917910A
Cited
US926131A
Cited
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 |