US2441879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated shoe
Assignee: Individual
•
Filing: 1945-11-13
•
Granted: 1948-05-18
•
Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 Richard R Gantt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US340098A
Cited
US572103A
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US616112A
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US795502A
Cited
US1364226A
Cited
US1423445A
Cited
US2086790A
Cited
US2151152A
Cited
US2329573A
Cited
US2397413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |