Patent US5600165A successfully refreshed from Google Patents.
US2501435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of woolen pile fabrics
Assignee: Wyeth Holdings LLC
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Filing: 1947-06-11
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Granted: 1950-03-21
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Expires: 1967-06-11
Abstract
No abstract record available.
Inventors
- 👤 Caspe Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF TREATING PILE FABRICS HAVING A PILE OF ANIMAL FIBERS WHICH COMPRISES APPLYING TO THE PILE ONLY OF SAID FABRIC AN AQUEOUS FORMALDEHYDE SOLUTION ACIDIFIED TO A PH OF ABOUT 2-3 AND THEN CONTACTING THE DAMPENED PILE MOMENTARILY WITH AN IRON HEATD TO AT LEAST 350*F. WHILE MAINTAINING THE PILE IN A RASIED CONDITION WHEREBY THE FIBERS OF THE PILE ARE CONVERTED TO A HAIR-LIKE CONDITION, SHEARING THE PILE, AND APPLYING THERE TO AN AQUOUS SOLUTION OF A CURABLE THERMOSETTING AMINOPLAST RESIN AND THEN HEATING THE PILE TO CURE THE RESIN TO A WATER-INSOLUBLE CONDITION.
Claim 2
Independent Claim
97 words
A METHOD OF TREATING PILE FABRICS HAVING A PILE OF ANIMAL FIBERS WHICH COMPRISES APPLYING TO THE PILE ONLY OF SAID FABRIC AN AQUEOUS FORMALDEHYDE SOLUTION ACIDIFIED TO A PH OF ABOUT 2-3 AND THEN CONTACTING THE DAMPENED PILE MOMENTARILY WITH AN IRON HEATD TO AT LEAST 350*F. WHILE MAINTAINING THE PILE IN A RASIED CONDITION WHEREBY THE FIBERS OF THE PILE ARE CONVERTED TO A HAIR-LIKE CONDITION, SHEARING THE PILE, AND APPLYING THERE TO AN AQUOUS SOLUTION OF A CURABLE THERMOSETTING AMINOPLAST RESIN AND THEN HEATING THE PILE TO CURE THE RESIN TO A WATER-INSOLUBLE CONDITION.
References Cited (Backward Citations)
US2055322A
Cited
US2225267A
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US2240388A
Cited
GB550541A
Cited
US2329622A
Cited
US2359444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |