US2437778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable support for invalids
Assignee: WALKABOUT Co
•
Filing: 1944-02-02
•
Granted: 1948-03-16
•
Expires: 1964-02-02
Abstract
No abstract record available.
Inventors
- 👤 Ames Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:42
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/04; A61H2003/046; A61H2201/00; A61H2201/16; A61H2201/1602; A61H2201/1614; A61H2201/1628; A61H2201/1633; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US694791A
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US1085573A
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US1521627A
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US1887351A
Cited
US1917440A
Cited
US1949163A
Cited
CH174000A
Cited
US2077569A
Cited
US2058205A
Cited
US2129260A
Cited
US2282689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |