US2770324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-leveling lift
Assignee: Individual
•
Filing: 1952-07-21
•
Granted: 1956-11-13
•
Expires: 1972-07-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:45
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/02; B66F9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US508510A
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US929870A
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US959786A
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US956205A
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US991137A
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US1268109A
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US2095041A
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US2139597A
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US2174415A
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US2409199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |