US3790434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fibers for artificial hair and production thereof
Assignee: Japan Exlan Co Ltd
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Filing: 1971-04-15
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Granted: 1974-02-05
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Expires: 1991-04-15
Abstract
Abstract Synthetic fibers for artificial hair are provided which have a bending rigidity EI of 2 - 9.5 dyne. cm2, a drape index Y of 0.04 X 10 5 - 0.24 X 10 5 cm 3 and a product value of EI times Y of 0.28 X 10 5 - 1.8 X 10 5. Such fibers have good esthetic appearance and handle as well as excellent hair - like feel and visual pliability.
Inventors
- 👤 M Sone
- 👤 M Okazaki
- 👤 Y Ueyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:31
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; D01D; D01D5/00; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2978; Y10T428/298; Y10T428/31504; Y10T428/31725; Y10T428/31786
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
The fiber as claimed in claim 1 wherein the sectional shape of the synthetic fiber is an ellipse.
Claim 2
Dependent Claim
31 words
The fiber as claimed in claim 1 wherein said fiber is made of a fiber-forming polymer selected from the group consisting of polyamides, polyesters, vinyl polymers, acrylic polymers and modacrylic polymers.
Claim 3
Dependent Claim
37 words
The fiber as claimed in claim 3, wherein the acrylic polymer is selected from the group consisting of polyacrylonitrile and a copolymer of more than 80 percent by weight acrylonitrile and one or more other vinyl monomers.
Claim 4
Dependent Claim
43 words
The fiber as claimed in claim 1, containing one or more additives selected from the group consisting of an antistatic agent, a flame-retarding agent and a luster-improving agent having a specific gravity differing from that of the synthetic polymer which constitutes the fiber.
Claim 5
Dependent Claim
52 words
The fiber as claimed in claim 1 wherein the fiber consists of an acrylic polymer composition containing one or more additives selected from the group consisting of an antistatic agent, a flame-retarding agent and a luster-improving agent having a specific gravity differing from that of the synthetic polymer which constitutes the fiber.
Claim 6
Dependent Claim
148 words
A synthetic fiber for artificial hair having hair-like pliable appearance, said fiber having a bending rigidity EI (dyne.cm.2) and a drape index Y (cm. 3) satisfying the equations 3.0 < or = EI < or = 8.00.20 X 10 5 < or = Y0.417 X 10 5 < or = EI.Y and wherein the longest length a of the straight line in the cross section of the fiber passing from a point on the periphery of the fiber to a point on the opposite side of the fiber through the center of gravity thereof is between 60 and 115 microns, and b/a is in the range of from one to one-fifth, b being the longest length of the straight line in the cross section of the fiber at a right angle to the line a between the points at the periphery of the cross section of the fiber.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |