US3360078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifts
Assignee: GRAND SPECIALTIES CO
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Filing: 1966-04-05
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Granted: 1967-12-26
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Expires: 1986-04-05
Abstract
No abstract record available.
Inventors
- 👤 Fred P Hopfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/18; B; B66; B66F; B66F11/00; B66F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A LIFT OF THE CHARACTER DESCRIBED WHEREIN A HORIZONTAL PLATFORM IS TO BE RAISED AND LOWERED BY A PAIR OF VERTICALLY EXTENDIBLE AND RETRACTIBLE ELEMENTS, A BASE ON WHICH SAID ELEMENTS ARE SUPPORTED, A PAIR OF CHAINS CONNECTED TO SAID PLATFORM AND HAVING PORTIONS TRAINED OVER SAID ELEMENTS SO THAT VERTICAL MOVEMENT OF SAID ELEMENTS IS ACCOMPANIED BY VERTICAL MOVEMENT OF THE PLATFORM, AND AN EQUALIZER FOR ASSURING THAT MOVEMENT OF ONE OF SAID ELEMENTS THROUGH A PREDETERMINED DISTANCE IS ACCOM-
Claim 2
Dependent Claim
82 words
IN A LIFT OF THE CHARACTER DESCRIBED WHEREIN A HORIZONTAL PLATFORM IS TO BE RAISED AND LOWERED BY A PAIR OF VERTICALLY EXTENDIBLE AND RETRACTIBLE ELEMENTS, A BASE ON WHICH SAID ELEMENTS ARE SUPPORTED, A PAIR OF CHAINS CONNECTED TO SAID PLATFORM AND HAVING PORTIONS TRAINED OVER SAID ELEMENTS SO THAT VERTICAL MOVEMENT OF SAID ELEMENTS IS ACCOMPANIED BY VERTICAL MOVEMENT OF THE PLATFORM, AND AN EQUALIZER FOR ASSURING THAT MOVEMENT OF ONE OF SAID ELEMENTS THROUGH A PREDETERMINED DISTANCE IS ACCOM-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |