US2667945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for invalids' wheel chairs
Assignee: Individual
•
Filing: 1950-03-10
•
Granted: 1954-02-02
•
Expires: 1970-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ruth A Caldeira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:05
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1005; A61G5/1013; A61G5/101; A61G5/1035; B; B62; B62B; B62B5/00; B62B5/04; B62B5/0457; B62B5/0461; Y; Y10; Y10S; Y10S188/00; Y10S188/02; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US200856A
Cited
GB191412891A
Cited
US1414756A
Cited
GB230314A
Cited
US1879759A
Cited
US2284220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |