US2448992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propelling power unit for invalid wheel chairs
Assignee: Individual
•
Filing: 1947-06-16
•
Granted: 1948-09-07
•
Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Love Homer
- 👤 Cecil E Britain
- 👤 Bowen D Langton
- 👤 Ralph E Van Gundy
- 👤 Charlie E Van Gundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:13
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/04; A61G5/047; A61G5/10; A61G5/1051; A61G5/1081; B; B62; B62M; B62M7/00; B62M7/14; A61G2203/00; A61G2203/10; A61G2203/14; B60; B60K; B60K1/00; B60K1/04; B60K2001/0405; B60K2001/0444; B60L; B60L2200/00; B60L2200/34; B60L2200/46; Y; Y10; Y10S; Y10S180/00; Y10S180/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |