US2633896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leg support for invalids' folding chairs
Assignee: Individual
•
Filing: 1950-08-25
•
Granted: 1953-04-07
•
Expires: 1970-08-25
Abstract
No abstract record available.
Inventors
- 👤 Thompson Herman Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:06
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/12; A61G5/08; A61G5/0808; A61G5/0816; A61G5/0825; A61G5/1054; A61G5/125; A61G5/128; Y; Y10; Y10S; Y10S297/00; Y10S297/04
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) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |