US3515384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand operated friction type exercising device
Assignee: DAVID D ALEXANDER
•
Filing: 1968-07-23
•
Granted: 1970-06-02
•
Expires: 1988-07-23
Abstract
No abstract record available.
Inventors
- 👤 David D Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/012; A63B21/015; A63B21/0004; A63B21/40; A63B21/4027; A63B21/4033; A63B21/4035; A63B21/4041; A63B21/4047; A63B23/00; A63B23/035; A63B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2725232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |