Patent US3456749A successfully refreshed from Google Patents.
US3456749A
Expired / Lapsed
US
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Hydraulic lifting device with weight estimator
Assignee: Individual
•
Filing: 1968-08-07
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Granted: 1969-07-22
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Expires: 1988-08-07
Abstract
No abstract record available.
Inventors
- 👤 Alois Joseph Smieja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:07
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/14; G01G19/16; G01G19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR506076A
Cited
US2662539A
Cited
US2613925A
Cited
DE1041812B
Cited
US2956761A
Cited
US3082836A
Cited
US3179192A
Cited
CH417470A
Cited
US3339873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |