US2581809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller skating suspension skates
Assignee: Individual
•
Filing: 1947-03-05
•
Granted: 1952-01-08
•
Expires: 1967-03-05
Abstract
No abstract record available.
Inventors
- 👤 Alan E Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:58
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US189451A
Cited
US257941A
Cited
US1002729A
Cited
US1302508A
Cited
US1342138A
Cited
US2025858A
Cited
US2086557A
Cited
US2016847A
Cited
US2330338A
Cited
US2356736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |