Patent US2652097A successfully refreshed from Google Patents.
US2652097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling crutch
Assignee: Individual
•
Filing: 1951-04-02
•
Granted: 1953-09-15
•
Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/04; A61H2003/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1394224A
Cited
US1448783A
Cited
US2129260A
Cited
US2305249A
Cited
US2374182A
Cited
US2519096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |