Patent US3076987A successfully refreshed from Google Patents.
US3076987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the stiffening of parts of footwear
Assignee: LEATHER IND RES I
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Filing: 1960-01-18
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Granted: 1963-02-12
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Expires: 1980-01-18
Abstract
No abstract record available.
Inventors
- 👤 Shuttleworth Stanley Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:58
CPC Classifications
A; A43; A43D; A43D11/00; A43B; A43B23/00; A43B23/08; A43B23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR STIFFENING PARTS OF FOOTWEAR COMPRISING THE STEPS OF PREPARING A DRY FABRIC STIFFENER BY PASSING A FABRIC THROUGH A BATH CONTAINING AT LEAST 5% UREA AND CONTAINING AN AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM SULPHATE AND AMMONIUM PHOSPHATE, COATING THE STIFFENER WITH A PARTIALLY CONDENSED UREA FORMALDEHYDE RESIN COMPOSITION
Claim 2
Dependent Claim
57 words
A PROCESS FOR STIFFENING PARTS OF FOOTWEAR COMPRISING THE STEPS OF PREPARING A DRY FABRIC STIFFENER BY PASSING A FABRIC THROUGH A BATH CONTAINING AT LEAST 5% UREA AND CONTAINING AN AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM SULPHATE AND AMMONIUM PHOSPHATE, COATING THE STIFFENER WITH A PARTIALLY CONDENSED UREA FORMALDEHYDE RESIN COMPOSITION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |