Patent US3387852A successfully refreshed from Google Patents.
US3387852A
Expired / Lapsed
US
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Detachable and removable roller skates
Assignee: EMMA DE SARRO
•
Filing: 1966-07-25
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Granted: 1968-06-11
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 Sarro Emma De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:20
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/04; A63C17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1835446A
Cited
GB400436A
Cited
US2048916A
Cited
US2168820A
Cited
US2551122A
Cited
FR1125607A
Cited
US3202435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |