Patent US3228707A successfully refreshed from Google Patents.
US3228707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two wheel tandem roller skates provided with anti-marring devices
Assignee: Individual
•
Filing: 1963-06-24
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Granted: 1966-01-11
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Davis George
- 👤 Davis Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/04; A63C17/06; A63C2201/00; A63C2201/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US308744A
Cited
US596111A
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US672376A
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US853447A
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US1612874A
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US1803019A
Cited
US2037964A
Cited
US2168820A
Cited
US2559118A
Cited
US3086787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |