US3140523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip elevators
Assignee: Jackson Memorial Hospital
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Filing: 1959-02-25
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Granted: 1964-07-14
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond G Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:41
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/06; E21B19/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A SLIP ELEVATOR COMPRISING A BODY HAVING A TAPERED BOWL, A PLURALITY OF SLIPS DISPOSED IN SAID BOWL FOR LONGITUDINAL AND RADIAL MOVEMENT, A PLATE OVERLYING CERTAIN OF SAID SLIPS AND ENGAGEABLE THEREWITH TO EFFECT LONGITUDINAL DOWNWARD MOVEMENT OF SAID SLIPS IN SAID BOWL UPON DOWNWARD MOVEMENT OF SAID PLATE, COENGAGEABLE MEANS ON SAID SLIPS FOR INTERCONNECTING SAID SLIPS FOR SUCH LONGITUDINAL MOVEMENT AS A UNIT, MEANS INCLUDING FASTENERS EXTENDING THROUGH SAID PLATE AND SUPPORTING SAID PLATE ON SAID SLIPS IN OVERLYING RELATION TO SAID SLIPS FOR MOVEMENT TOWARDS AND AWAY FROM ONE ANOTHER IN SAID BOWL, AND MEANS RESILIENTLY RESISTING MOVEMENT OF SAID SLIPS RELATIVE TO SAID PLATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |