US3398974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Walker attachment for wheel chair
Assignee: Individual
•
Filing: 1966-06-01
•
Granted: 1968-08-27
•
Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Edwards
- 👤 Raymond S Kleismit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:08
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/14; A61G5/1054; A61G7/00; A61G7/10; A61G7/1038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732004A
Cited
US2459066A
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US2596055A
Cited
US2556121A
Cited
US2862544A
Cited
US2855979A
Cited
US3237940A
Cited
US3279567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |