US3621789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski lift
Assignee: Individual
•
Filing: 1968-10-22
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Granted: 1971-11-23
•
Expires: 1988-10-22
Abstract
Abstract AN APPARATUS FOR CONVEYING SKIERS SAFELY TO THE TOP OF A SKI SLOPE CHARACTERIZED BY SADDLE-TYPE SEATS WHICH ARE MOUNTED AND DE-MOUNTED BY SKIERS FROM THE REAR WHILE THE SEATS ARE MOVING AT A RELATIVELY FAST RATE IN COMPARISON TO CONVENTIONAL EQUIPMENT, THEREBY GREATLY INCREASING THE OVERAL SPEED AND CAPACITY OF THE LIFT WITHOUT DECREASING SAFETY. EXISTING CONVENTIONAL EQUIPMENT IS READILY CONVERTIBLE.
Inventors
- 👤 David R Pender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:03
CPC Classifications
B; B61; B61B; B61B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |