US2721399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective shoe covering
Assignee: WARREN FEATHERBONE CO
•
Filing: 1954-05-24
•
Granted: 1955-10-25
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Emmer Charles Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:34
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/16; A43B3/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE244928C
Cited
US1447586A
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US1830471A
Cited
US1794850A
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AT129014B
Cited
US2041505A
Cited
US2479006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |