Patent US6689164B1 successfully refreshed from Google Patents.
US2495573A
Expired / Lapsed
US
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Motor attachment for wheel chairs
Assignee: Individual
•
Filing: 1948-10-13
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Granted: 1950-01-24
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Expires: 1968-10-13
Abstract
No abstract record available.
Inventors
- 👤 Duke Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:37
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/04; A61G5/047; A61G5/08; A61G5/0808; A61G5/0816; A61G5/0825; A61G5/10; A61G5/1051; A61G5/1054; A61G7/00; A61G7/05; A61G7/0528; B; B60; B60K; B60K1/00; A61G2203/00; A61G2203/10; A61G2203/14; Y; Y10; Y10S; Y10S180/00; Y10S180/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348568A
Cited
US1455720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |