Patent US2561616A successfully refreshed from Google Patents.
US2561616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible wheel chair
Assignee: Individual
•
Filing: 1946-11-01
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Granted: 1951-07-24
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Expires: 1966-11-01
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 10:09
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/12; A61G5/125; A61G5/128; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US924177A
Cited
GB110122A
Cited
US1394224A
Cited
CH223747A
Cited
US2354949A
Cited
US2379566A
Cited
US2459066A
Cited
US2431112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |