US4559268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament for brushmaking
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1984-07-02
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Granted: 1985-12-17
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Expires: 2004-07-02
Abstract
Abstract A filament for brushmaking which is excellent in yield and in bend recovery, and when used in making paintbrushes, can give brushes with good paintability. A filament has a specified cross section having a plurality of cavity of hollow structures, the hollow ratio being 20 to 60% based on the whole cross-sectional area, capable of affording greater yield, ready processability at its end, excellent stiffness and excellent cleanability.
Inventors
- 👤 Hiroyuki Nakashima
- 👤 Atuyoshi Tamura
- 👤 Yoichi Kanbara
- 👤 Masaharu Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:40
CPC Classifications
A; A46; A46D; A46D1/00; A46D1/02; A46D1/0238; A46D1/0246; D; D01; D01D; D01D5/00; D01D5/24; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A filament for brushmaking made of a thermoplastic polymer and having a plurality of cavities or hollow structures, a lateral cross section of the filament having at least two end sections and a middle section, each of said end portions being bent in a continuous curve so as to meet and contact said middle section thereby defining said cavities or hollow structures, and the cross-sectional area of said cavities or hollow structures being 20 to 60% of the cross-sectional area of the filament.
Claim 2
Dependent Claim
83 words
A filament for brushmaking made of a thermoplastic polymer and having a plurality of cavities or hollow structures, a lateral cross section of the filament having at least two end sections and a middle section, each of said end portions being bent in a continuous curve so as to meet and contact said middle section thereby defining said cavities or hollow structures, and the cross-sectional area of said cavities or hollow structures being 20 to 60% of the cross-sectional area of the filament.
Claim 3
Dependent Claim
25 words
A filament as defined in claim 1 having two end sections which meet and contact said middle section on opposite sides of said middle section.
Claim 4
Dependent Claim
26 words
A filament as defined in claim 1 having two end sections which meet and contact said middle section on the same side of said middle section.
Claim 5
Dependent Claim
25 words
A filament as defined in claim 2 wherein said end sections each have a tip and meet and contact said middle section at said tip.
Claim 6
Dependent Claim
27 words
A filament as defined in claim 2 wherein said end sections each have a tip and meet and contact said middle section other than at said tip.
Claim 7
Dependent Claim
18 words
A filament as defined in claim 5 wherein said end sections curve inwardly to contact said middle section.
Claim 8
Dependent Claim
18 words
A filament as defined in claim 5 wherein said end sections curve outwardly to contact said middle section.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |