US2680902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welt support
Assignee: Individual
•
Filing: 1948-02-06
•
Granted: 1954-06-15
•
Expires: 1968-02-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Amico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:31
CPC Classifications
A; A43; A43B; A43B15/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12215; Y10T428/12361; Y10T428/12368; Y10T428/1241
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US453985A
Cited
US504520A
Cited
USRE16115E
Cited
US646777A
Cited
US1073570A
Cited
US1060452A
Cited
US1536575A
Cited
GB242765A
Cited
US1925363A
Cited
US1937997A
Cited
US2003448A
Cited
US2448165A
Cited
US2429255A
Cited
GB602013A
Cited
US2440412A
Cited
US2567790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |