Patent US3449844A successfully refreshed from Google Patents.
US3449844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective inner sole
Assignee: Spenco Medical Corp
•
Filing: 1967-05-05
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Granted: 1969-06-17
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 Wayman R Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/14; A43B7/1405; A43B7/1455; A43B13/00; A43B13/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735426A
Cited
GB586379A
Cited
US2586045A
Cited
US2658288A
Cited
US2748502A
Cited
US3120711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |