Patent US2981518A successfully refreshed from Google Patents.
US2981518A
Expired / Lapsed
US
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Lifting mechanism
Assignee: Anderson Company of Indiana
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Filing: 1957-10-02
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Granted: 1961-04-25
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Expires: 1977-10-02
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:45
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; B66F3/18; B66F3/44; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19744; Y10T74/19781; Y10T74/19791; Y10T74/19795
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324851A
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US1526155A
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US2107715A
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US2251759A
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US2328897A
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US2768532A
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US2708374A
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GB774216A
Cited
US2806383A
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GB779420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |