US2643898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled wheel chair
Assignee: Individual
•
Filing: 1948-06-25
•
Granted: 1953-06-30
•
Expires: 1968-06-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Everest
- 👤 Harry C Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:25
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/08; A61G5/02; A61G5/021; A61G5/023; A61G5/024; A61G5/025; A61G5/0808; A61G5/0816; A61G5/0825; A61G5/10; A61G5/1051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1020432A
Cited
US1105216A
Cited
FR494150A
Cited
US1600131A
Cited
US2135347A
Cited
US2198942A
Cited
US2511165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |