US3237320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefinished heel with fibrous core
Assignee: St Lawrence Manufacturing Co Inc
•
Filing: 1964-04-14
•
Granted: 1966-03-01
•
Expires: 1984-04-14
Abstract
No abstract record available.
Inventors
- 👤 George A E Couture
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:12
CPC Classifications
A; A43; A43B; A43B5/00; A43B5/16; A43B21/00; A43B21/02; A43B21/36; A43B21/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PREFINISHED HEEL FOR FOOTWEAR COMPRISING, A FILLER OF COMPACTED FIBROUS MATERIAL HAVING A DENSITY OF BETWEEN 24 TO 34 POUNDS PER CUBIC FOOT AND A MOISTURE CONTENT OF LESS THAN 5%, AN OUTER SHELL FORMED OF A HEAT SOFTENED PLASTIC MATERIAL MOLDED ABOUT SAID FILLER UNDER HEAT AND PRESSURE, SAID SHELL HAVING INTEGRAL AND CONTINUOUS SIDE WALLS, BOTTOM AND A TOP, WITH THE BOTTOM HAVING A FLAT SUBSTANTIALLY UNIPLANAR OUTER SURFACE AND SAID TOP HAVING A CONCAVE OUTER SURFACE.
Claim 2
Dependent Claim
80 words
A PREFINISHED HEEL FOR FOOTWEAR COMPRISING, A FILLER OF COMPACTED FIBROUS MATERIAL HAVING A DENSITY OF BETWEEN 24 TO 34 POUNDS PER CUBIC FOOT AND A MOISTURE CONTENT OF LESS THAN 5%, AN OUTER SHELL FORMED OF A HEAT SOFTENED PLASTIC MATERIAL MOLDED ABOUT SAID FILLER UNDER HEAT AND PRESSURE, SAID SHELL HAVING INTEGRAL AND CONTINUOUS SIDE WALLS, BOTTOM AND A TOP, WITH THE BOTTOM HAVING A FLAT SUBSTANTIALLY UNIPLANAR OUTER SURFACE AND SAID TOP HAVING A CONCAVE OUTER SURFACE.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |