US2558759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial ski chute
Assignee: Individual
•
Filing: 1946-01-09
•
Granted: 1951-07-03
•
Expires: 1966-01-09
Abstract
No abstract record available.
Inventors
- 👤 Robert H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:49
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US910569A
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US1389391A
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US2136450A
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US2254482A
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US2174716A
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US2358963A
Cited
US2265242A
Cited
US2272847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |