US2447681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of stiffening shoe parts
Assignee: Beckwith Manufacturing Co
•
Filing: 1944-07-18
•
Granted: 1948-08-24
•
Expires: 1964-07-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Beckwith
- 👤 Adelbert P Swett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/08; A43B23/16; A43D; A43D11/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1323284A
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US1695912A
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US1979461A
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US2233477A
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GB493250A
Cited
US2252554A
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US2277941A
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US2343390A
Cited
US2384936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |