US3574107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial skiing surfaces
Assignee: USM Corp
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Filing: 1968-04-05
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Granted: 1971-04-06
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Expires: 1988-04-05
Abstract
Abstract AN ARTIFICIAL SKIING SURFACE COMPRISING A PLURALITY OF LAYERS OF MATERIAL, EACH LAYER HAVING PROPERTIES SIMILAR TO CORRESPONDING LAYERS OF NATURAL SNOW, INCLUDING A BOTTOM LAYER OF RELATIVELY HARD MATERIAL CORRESPONDING TO HARD PACKED BASE SNOW, AN UPPER LAYER OF UPSTANDING FILAMENTS CORRESPONDING TO SURFACE POWDER SNOW, AND AT LEAST ONE LAYER BETWEEN THE BOTTOM AND UPPER LAYERS OF RELATIVELY SPONGE-LIKE MATERIAL CORRESPONDING TO PACKED POWDER SNOW. THE LAYERS ARE BONDED TOGETHER TO FORM A LAMINATED ARTIFICIAL SKIING SURFACE PROVIDING FOR A SKIING EXPERIENCE CLOSELY RESEMBLING THAT OBSERVED IN NATURAL SNOW.
Inventors
- 👤 Joseph L Hurka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:47
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/12; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/23964; Y10T428/24; Y10T428/24008
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |