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Patent US4585464A successfully refreshed from Google Patents.
US4585464A
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Low moisture absorption abrasive bristle of polybutylene terephthalate
Assignee: GLASSMASTER COMPANY A SOUTH CAROLINA CORP
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Filing: 1985-05-20
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Granted: 1986-04-29
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Expires: 2005-05-20
Abstract
Abstract A bristle material is disclosed having improved stiffness comprised of a thermoplastic matrix comprising polybutylene terephthalate and containing an abrasive filler.
Inventors
- 👤 John C. Haylock
- 👤 Peter R. Saunders
- 👤 Garland L. Turner
- 👤 Ian C. Twilley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:41
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/10; C08K3/14; A; A46; A46D; A46D1/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A bristle material comprised of a thermoplastic matrix and an abrasive filler material dispersed therein; (a) said bristle material having a diameter ranging from about 0.02 to 0.09 inches (b) said thermoplastic matrix consisting essentially of polybutylene terephthalate having an intrinsic viscosity of at least about 0.60; and (c) said abrasive filler being present in an amount of about 5 to about 50 weight percent based on the total weight of the bristle.
Claim 2
Dependent Claim
73 words
A bristle material comprised of a thermoplastic matrix and an abrasive filler material dispersed therein; (a) said bristle material having a diameter ranging from about 0.02 to 0.09 inches (b) said thermoplastic matrix consisting essentially of polybutylene terephthalate having an intrinsic viscosity of at least about 0.60; and (c) said abrasive filler being present in an amount of about 5 to about 50 weight percent based on the total weight of the bristle.
Claim 3
Dependent Claim
57 words
The bristle material of claim 1 wherein the abrasive material has a Knoop Scale hardness of greater than about 1,000, is present in concentrations ranging from about 15 to about 30 percent based on the weight of the filled bristle, and has a grit size passing through a screen size of about 10 to about 1,500 mesh.
Claim 4
Dependent Claim
24 words
The bristle material of claim 3 wherein the abrasive material has a grit size passing through a screen size about 80 to about 500.
Claim 5
Dependent Claim
23 words
The bristle material of claim 3 wherein the abrasive material silicon carbide and has a Knoop Scale hardness of about 2,130 to 2,500.
Claim 6
Dependent Claim
23 words
The bristle material of claim 3 wherein the abrasive material is aluminum oxide having a Knoop Scale hardness of about 1,250 to 1,750.
Claim 7
Dependent Claim
22 words
The bristle material of claim 1 wherein the bristle material has a diameter ranging from about 0.02 inches to about 0.06 inches.
References Cited (Backward Citations)
US3522342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |