US2919453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stiffening parts of footwear by insertion of hardener impregnated blank coated with synthetic resin
Assignee: LEATHER IND RES I
•
Filing: 1956-04-23
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Granted: 1960-01-05
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Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Stanley G Shuttleworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/08; A43B23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR STIFFENING PARTS OF FOOTWEAR COMPRISING THE STEPS OF PROVIDING A DRY FABRIC STIFFENER INPREGNATED WITH AN AMMONIUM SALT CONTAINING HARDENING COMPOSITION, THE AMMONIUM SALT BEING ONE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM SULPHATE AND AMMONIUM PHOSPHATE, COATING THE STIFFENER WITH A PARTIALLY CONDENSED UREA FORMALDEHYDE RESIN COMPOSITION IN AT LEAST SEMI-LIQUID FORM AT A TIME JUST PRIOR TO MOULDING THE FOOTWEAR TO THE LAST, INSERTING THE COATED STIFFENER INTO THE PART OF THE FOOTWEAR TO BE STIFFENED, AND MOULDING THE FOOTWEAR TO THE SHAPE OF THE LAST.
Claim 2
Dependent Claim
93 words
A PROCESS FOR STIFFENING PARTS OF FOOTWEAR COMPRISING THE STEPS OF PROVIDING A DRY FABRIC STIFFENER INPREGNATED WITH AN AMMONIUM SALT CONTAINING HARDENING COMPOSITION, THE AMMONIUM SALT BEING ONE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM SULPHATE AND AMMONIUM PHOSPHATE, COATING THE STIFFENER WITH A PARTIALLY CONDENSED UREA FORMALDEHYDE RESIN COMPOSITION IN AT LEAST SEMI-LIQUID FORM AT A TIME JUST PRIOR TO MOULDING THE FOOTWEAR TO THE LAST, INSERTING THE COATED STIFFENER INTO THE PART OF THE FOOTWEAR TO BE STIFFENED, AND MOULDING THE FOOTWEAR TO THE SHAPE OF THE LAST.
References Cited (Backward Citations)
GB190812641A
Cited
GB270959A
Cited
US2001032A
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US2254228A
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US2424869A
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US2512003A
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US2277941A
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US2340591A
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US2406738A
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US2596136A
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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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |