US3930103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light transmitting fibers
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-06-19
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Granted: 1975-12-30
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Expires: 1994-06-19
Abstract
Abstract Light transmitting fibers having core-sheath structure which comprises a polymer mainly composed of methyl methacrylate containing at least 60 mol % of methyl methacrylate as a core component and a vinylidene fluoride-tetrafluoroethylene copolymer containing 60 to 80 mol % of vinylidene fluoride as a sheath component have a high light transmissibility and high bending strength and abrasion resistance.
Inventors
- 👤 Kazuya Chimura
- 👤 Shunichi Takashima
- 👤 Ryuichi Nakazono
- 👤 Masao Kawashima
- 👤 Hiroyuki Ota
- 👤 Takashi Kaneko
- 👤 Kenichi Sakunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; D; D01; D01F; D01F8/00; D01F8/04; D01F8/10; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/918; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2938
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
LIGHT TRANSMITTING FIBERS HAVING CORE-SHEATH STRUCTURE, WHICH COMPRISES A POLYMER MAINLY COMPOSED OF METHYL METHACRYLATE CONTAINING AT LEAST 60 MOL % OF METHYL METHACRYLATE AS A CORE COMPONENT AND A VINYLIDE FLUORIDE-TETRAFLUOROETYLENE COPOLYMER CONTAINING 60 TO 80 MOL % OF VINYLIDENE FLLUORIDE AS A SHEATH COMPONENT.
Claim 2
Dependent Claim
46 words
LIGHT TRANSMITTING FIBERS HAVING CORE-SHEATH STRUCTURE, WHICH COMPRISES A POLYMER MAINLY COMPOSED OF METHYL METHACRYLATE CONTAINING AT LEAST 60 MOL % OF METHYL METHACRYLATE AS A CORE COMPONENT AND A VINYLIDE FLUORIDE-TETRAFLUOROETYLENE COPOLYMER CONTAINING 60 TO 80 MOL % OF VINYLIDENE FLLUORIDE AS A SHEATH COMPONENT.
Claim 3
Dependent Claim
25 words
Light transmitting fibers according to claim 1, wherein the sheath component comprises a vinylidene fluoride-tetrafluoroethylene copolymer containing 65 to 75 mol % of vinylidene fluoride.
Claim 4
Dependent Claim
28 words
Light transmitting fibers according to claim 1, wherein the core component comprises a polymer mainly composed of methyl methacrylate containing at least 90 mol % of methyl methacrylate.
Claim 5
Dependent Claim
27 words
Light transmitting fibers according to claim 1, which are produced by composite spinning the core and sheath components blended in concentric circle state at 190* to 260*C.
Claim 6
Dependent Claim
24 words
Light transmitting fibers according to claim 4, wherein the composite spun fibers are oriented by stretching to 1.2 to 2.0 times the original length.
Claim 7
Dependent Claim
31 words
Light transmitting fibers according to claim 1, which is obtained by forming the core component polymer into fibers and coating the sheath component polymer dissolved in a solvent on said fibers.
Claim 8
Dependent Claim
13 words
Light transmitting fibers according to claim 6, wherein the solvent is ethyl acetate.
Claim 9
Independent Claim
58 words
A METHOD FOR PRODUCING LIGHT TRANSMITTING FIBERS WHICH COMPRISES COMPOSITE SPINNING A POLYMER MAINLY COMPOSED OF METHYL METHACRYLATE CONTAINING AT LEAST 60 MOL % OF METHYL METHACRYLATE AS A CORE COMPONENT AND A VINYLIDENE FLUORIDETETRAFLUOROETHYLENE COPOLYMER CONTAINING 60 TO 80 MOL % OF VINYLIDENE FLUORIDE AND STREACHING THE RESULTANT FILAMENTS TO 1.2 TO 2.0 TIMES THE ORIGINAL LENGTH.
Claim 10
Independent Claim
58 words
A METHOD FOR PRODUCING LIGHT TRANSMITTING FIBERS WHICH COMPRISES COMPOSITE SPINNING A POLYMER MAINLY COMPOSED OF METHYL METHACRYLATE CONTAINING AT LEAST 60 MOL % OF METHYL METHACRYLATE AS A CORE COMPONENT AND A VINYLIDENE FLUORIDETETRAFLUOROETHYLENE COPOLYMER CONTAINING 60 TO 80 MOL % OF VINYLIDENE FLUORIDE AND STREACHING THE RESULTANT FILAMENTS TO 1.2 TO 2.0 TIMES THE ORIGINAL LENGTH.
Claim 11
Independent Claim
57 words
A method for producing light transmitting fibers which comprises coating the sheath component copolymer of vinylidene fluoride and tetrafluoroethylene containing 60 to 80 mol % of vinylidene fluoride which is dissolved in a solvent on the filaments formed from the core component polymer mainly composed of methyl methacrylate containing at least 60 mol % of methyl methacrylate.
Claim 12
Independent Claim
57 words
A method for producing light transmitting fibers which comprises coating the sheath component copolymer of vinylidene fluoride and tetrafluoroethylene containing 60 to 80 mol % of vinylidene fluoride which is dissolved in a solvent on the filaments formed from the core component polymer mainly composed of methyl methacrylate containing at least 60 mol % of methyl methacrylate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |