US2424428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Innersole and method of making the same
Assignee: CHARLES G KEFERSTEIN
•
Filing: 1944-03-07
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Granted: 1947-07-22
•
Expires: 1964-03-07
Abstract
No abstract record available.
Inventors
- 👤 Fred L Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:15
CPC Classifications
A; A43; A43D; A43D43/00; A43D43/06; A43B; A43B13/00; A43B13/38; A43B13/39
Claims Analysis
Total Claims: 0
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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) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |