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US2431112A
Expired / Lapsed
US
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One-arm drive for wheel chairs
Assignee: Individual
•
Filing: 1945-10-01
•
Granted: 1947-11-18
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Expires: 1965-10-01
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Everest
- 👤 Harry C Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/02; Y; Y10; Y10S; Y10S180/00; Y10S180/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191222576A
Cited
US1995155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |