Patent US3485510A successfully refreshed from Google Patents.
US3485510A
Expired / Lapsed
US
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Self-propelling and steering attachment apparatus for a wheel chair
Assignee: Individual
•
Filing: 1967-10-16
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Granted: 1969-12-23
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Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Julio Merlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:53
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/02; A61G5/021; A61G5/023; A61G5/024; A61G5/026; A61G5/027; A61G5/10; A61G5/1051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE529233A
Cited
US327979A
Cited
US505373A
Cited
FR458686A
Cited
US2633896A
Cited
US2818910A
Cited
US3193305A
Cited
GB1044078A
Cited
US3381973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |