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Patent US4279053A successfully refreshed from Google Patents.
US4279053A
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US
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Tri- or tetra-locular paint brush bristles
Assignee: EIDP Inc
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Filing: 1979-09-24
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Granted: 1981-07-21
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Expires: 1999-09-24
Abstract
Abstract Tri- or tetra-locular oriented polymeric paintbrush bristles.
Inventors
- 👤 Robert H. Payne
- 👤 Robert L. Rackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
A; A46; A46D; A46D1/00; A46D1/02; A46D1/0238; A46D1/0246; D; D01; D01D; D01D5/00; D01D5/24; A46B; A46B2200/00; A46B2200/20; A46B2200/202; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
In a monofilamentary paintbrush bristle of thermoplastic polymeric material having a diameter of about from 4 to 20 mils (0.10 to 0.51 mm), the improvement wherein the filament is tri- or tetra-locular and comprises three or four enclosed, longitudinal, noncircular voids, the voids being separated by an interior web, the cross-sectional area of the filament having a void content of about from 20 to 50%, and wherein the interior web comprises about from 10 to 25% of the total cross-sectional area of the filament.
Claim 2
Dependent Claim
84 words
In a monofilamentary paintbrush bristle of thermoplastic polymeric material having a diameter of about from 4 to 20 mils (0.10 to 0.51 mm), the improvement wherein the filament is tri- or tetra-locular and comprises three or four enclosed, longitudinal, noncircular voids, the voids being separated by an interior web, the cross-sectional area of the filament having a void content of about from 20 to 50%, and wherein the interior web comprises about from 10 to 25% of the total cross-sectional area of the filament.
Claim 3
Dependent Claim
30 words
A brush bristle of claim 1 wherein the brush bristle is tapered to provide a tip diameter of about from 0.5 to 0.75 times the diameter of the butt end.
Claim 4
Dependent Claim
9 words
A brush bristle of claim 1 which is trilocular.
Claim 5
Dependent Claim
14 words
A brush bristle of claim 1 wherein the polymeric material consists essentially of polyamide.
Claim 6
Dependent Claim
14 words
A brush bristle of claim 4 wherein the polyamide consists essentially of nylon 612.
Claim 7
Dependent Claim
14 words
A brush bristle of claim 4 wherein the polyamide consists essentially of nylon 610.
Claim 8
Dependent Claim
15 words
A brush bristle of claim 1 wherein the polymeric material consists essentially of polybutylene terephthalate.
Claim 9
Dependent Claim
11 words
A brush bristle of claim 1 which is tipped and flagged.
References Cited (Backward Citations)
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |