US3616552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid footwear
Assignee: Individual
•
Filing: 1969-09-08
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Granted: 1971-11-02
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Expires: 1989-09-08
Abstract
Abstract AN ANTISKID FOOTWEAR INCLUDING AN UPPER CONNECTED TO A SOLE AND A SPIKE HAVING A HEAD FROM WHICH EXTENDS A POINTED PORTION, THE SPIKE BEING EMBEDDED IN THE SOLE WITH THE HEAD SUBSTANTIALLY CENTRALLY TRANSVERSELY OF THE THICKNESS OF THE SOLE AND THE POINED PORTION EXTENDING OUTWARDLY FROM THE BOTTOM SURFACE OF THE SOLE.
Inventors
- 👤 Alvin R Kniffin
- 👤 Richard B Haro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
A; A43; A43C; A43C15/00; A43C15/16; A43C15/162; A43C15/164; A43C15/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |