Patent US2522338A successfully refreshed from Google Patents.
US2522338A
Expired / Lapsed
US
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Process for shrink-proofing wool and woolen fabrics
Assignee: Wyeth Holdings LLC
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Filing: 1945-02-19
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Granted: 1950-09-12
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Expires: 1965-02-19
Abstract
No abstract record available.
Inventors
- 👤 Everett N Angus
- 👤 Joseph W Creely
- 👤 Ralph M Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:48
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR CONTROLLING THE SHRINKING, FELTING AND FULLING OF WOOL WHICH COMPRISES IMPREGNATING RAW WOOL WITH FROM 2.5% TO 30% OF ITS WEIGHT TO AN UNCURED THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF UREAFORMALDEHYDE, THIOREA-FORMALDEHYDE AND MELAMINE-FORMALDEHYDE RESINS IN THE FORM OF AN AQUEOUS SOLUTION, DRYING CARDS AND SPINNING THE IMPREGNATED WOOL AND FINALLY HEATING THE WOOL AT A TEMPERATURE WITHIN THE RANGE OF 200450*F. UNTIL THE RESIN IS CONVERTED TO ITS CURED AND WATER-INSOLUBLE CONDITION.
Claim 2
Dependent Claim
78 words
A PROCESS FOR CONTROLLING THE SHRINKING, FELTING AND FULLING OF WOOL WHICH COMPRISES IMPREGNATING RAW WOOL WITH FROM 2.5% TO 30% OF ITS WEIGHT TO AN UNCURED THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF UREAFORMALDEHYDE, THIOREA-FORMALDEHYDE AND MELAMINE-FORMALDEHYDE RESINS IN THE FORM OF AN AQUEOUS SOLUTION, DRYING CARDS AND SPINNING THE IMPREGNATED WOOL AND FINALLY HEATING THE WOOL AT A TEMPERATURE WITHIN THE RANGE OF 200450*F. UNTIL THE RESIN IS CONVERTED TO ITS CURED AND WATER-INSOLUBLE CONDITION.
References Cited (Backward Citations)
US1673797A
Cited
US2121006A
Cited
GB437642A
Cited
US2050156A
Cited
US2161805A
Cited
US2329622A
Cited
USRE22566E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |