Patent US2980436A successfully refreshed from Google Patents.
US2980436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single wheel skate
Assignee: Individual
•
Filing: 1960-06-06
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Granted: 1961-04-18
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 John J Kosach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:42
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/04; A63C17/06; A63C17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE313449C
Cited
GB190304752A
Cited
US1023882A
Cited
CH69010A
Cited
FR753203A
Cited
US2208888A
Cited
US2802693A
Cited
US2931012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |