US4835803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a shape-memorizing wool and animal hair
Assignee: Individual
•
Filing: 1987-07-21
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Granted: 1989-06-06
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Expires: 2007-07-21
Abstract
Abstract This invention relates to a process for producing permanently waved wool and animal hair. In addition to providing a process for waving wool and animal hair, the process of the present invention improves the elasticity of these natural fibers. Yarns with better elasticity and expansibility and with sufficient swelling property can be obtained after spinning. When woven or knitted, a produce with a lower specific weight with better elasticity and expansibility and with better anti-shrinking and anti-inflammatory properties cna be obtained.
Inventors
- 👤 Shigesaburo Mizushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/50; D06M13/00; D06M13/244; D06M13/248; D06M13/252
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
A process for permanently waving the fibers of wool and animal hair, comprising the sequential steps of (a) subjecting said fibers to steam, (b) crimping the steamed fiber by crimping means, (c) contacting the crimped fibers with a reducing agent whereby cystine bonds are cleaved and washing the cleaved fibers with water, (d) modifying the cleaved fibers by contacting with an aqueous solution of guanidine carbonate or guanidine phosphate, and protein derived from collagen, keratin or fibroin and washing the modified fibers with water, (e) contacting the modified fibers with an oxidizing agent and removing said crimping means.
Claim 2
Dependent Claim
98 words
A process for permanently waving the fibers of wool and animal hair, comprising the sequential steps of (a) subjecting said fibers to steam, (b) crimping the steamed fiber by crimping means, (c) contacting the crimped fibers with a reducing agent whereby cystine bonds are cleaved and washing the cleaved fibers with water, (d) modifying the cleaved fibers by contacting with an aqueous solution of guanidine carbonate or guanidine phosphate, and protein derived from collagen, keratin or fibroin and washing the modified fibers with water, (e) contacting the modified fibers with an oxidizing agent and removing said crimping means.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein said protein is derived from collagen.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein said protein is derived from keratin.
Claim 5
Dependent Claim
13 words
A process according to claim 1 wherein said protein is derived from fibroin.
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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |