US2927631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding wheel chair
Assignee: Individual
•
Filing: 1956-04-10
•
Granted: 1960-03-08
•
Expires: 1976-04-10
Abstract
No abstract record available.
Inventors
- 👤 Andersson Torsten Sigfr Anders
- 👤 Bjursten Nils Elof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:02
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/08; A61G5/0808; A61G5/0816; A61G5/0891; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2733754A
Cited
US909411A
Cited
US1997767A
Cited
US2402832A
Cited
US2520309A
Cited
US2449498A
Cited
US2519771A
Cited
US2592405A
Cited
US2509972A
Cited
US2681689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |