Patent US3901236A successfully refreshed from Google Patents.
Patent US2492920A successfully refreshed from Google Patents.
US2492920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device in aid of spastics
Assignee: Individual
•
Filing: 1945-12-22
•
Granted: 1949-12-27
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Koster Grace Vivien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:29
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/04; A61F5/05; A61F5/058; A61F5/05841; A61F5/0585; A61F5/0102; A61F5/0104; A61F5/0193
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1562150A
Cited
US1955017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |