US2815020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exerciser for feet and legs
Assignee: Individual
•
Filing: 1955-09-16
•
Granted: 1957-12-03
•
Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
- 👤 Barkschat Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
A; A61; A61H; A61H1/00; A61H1/02; A61H1/0237; A61H1/0266; A61H1/0255; A61H1/0262; A61H2201/00; A61H2201/01; A61H2201/0157; A61H2201/0161; A61H2201/16; A61H2201/1602; A61H2201/1623; A61H2201/1628; A61H2201/1633; A61H2201/1635; A61H2201/164; A61H2201/1642; A61H2201/1657; A61H2201/1676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1948534A
Cited
US2216764A
Cited
US2566239A
Cited
US2724592A
Cited
US2735422A
Cited
US2756743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |