US3521623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back brace
Assignee: KENNETH G MARKLEY
•
Filing: 1965-02-12
•
Granted: 1970-07-28
•
Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Wayne Nichols
- 👤 Kenneth G Markley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/02; A61F5/028; Y; Y10; Y10S; Y10S128/00; Y10S128/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA514278A
Cited
US2733712A
Cited
US1884927A
Cited
GB483111A
Cited
FR1015989A
Cited
US2730096A
Cited
US3052236A
Cited
FR1322197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |