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US3547749A
Expired / Lapsed
US
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Slide surfacing for ski slopes
Assignee: BORG TEXTILE Corp A CORP OF DEL
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Filing: 1969-01-31
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Granted: 1970-12-15
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Expires: 1989-01-31
Abstract
No abstract record available.
Inventors
- 👤 James W G White
- 👤 Harry A Freedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:42
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/12; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23929; Y10T428/23936; Y10T428/23957; Y10T428/23979
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3034194A
Cited
US3155557A
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US3275487A
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US3251596A
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US3314845A
Cited
US3350092A
Cited
US3415172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |