Patent US2831454A successfully refreshed from Google Patents.
US2831454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic lift and transfer machine
Assignee: Detrex Corp
•
Filing: 1955-02-02
•
Granted: 1958-04-22
•
Expires: 1975-02-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Kearney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:49
CPC Classifications
B; B65; B65G; B65G49/00; B65G49/02; B65G49/04; B65G49/0409; B65G49/0436; B65G49/044; B65G49/0445
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1960339A
Cited
US1404309A
Cited
DE544861C
Cited
US2048937A
Cited
US2341197A
Cited
US2708417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |