Patent US2847057A successfully refreshed from Google Patents.
US2847057A
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Walking aid
Assignee: WALK A GAIN WALKING AIDS Inc
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Filing: 1954-05-03
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Granted: 1958-08-12
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Holcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/04; A61H2003/046; A61H2201/00; A61H2201/16; A61H2201/1602; A61H2201/1614; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20546; Y10T74/20576; Y10T74/20732; Y10T74/2078; Y10T74/20792
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US130283A
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US447928A
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US1727969A
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US2362466A
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US2459066A
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US2575681A
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US2630961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |