US2624546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift mechanism
Assignee: Walker Manufacturing Company of Wisconsin
•
Filing: 1947-03-27
•
Granted: 1953-01-06
•
Expires: 1967-03-27
Abstract
No abstract record available.
Inventors
- 👤 Fred C Haumerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:28
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB339367A
Cited
US2048420A
Cited
GB372573A
Cited
US2044989A
Cited
US1958026A
Cited
US1993060A
Cited
GB441280A
Cited
US2139597A
Cited
US2238573A
Cited
US2199524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |