US2821394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring roller-type exerciser
Assignee: Individual
•
Filing: 1954-12-24
•
Granted: 1958-01-28
•
Expires: 1974-12-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond J M Barbeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:38
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/06; A63B21/0618; A63B21/02; A63B21/023; A63B21/025; A63B23/00; A63B23/035; A63B23/12; A63B23/1209; A63B23/1236
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |