US3706111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush bristles
Assignee: EIDP Inc
•
Filing: 1970-08-21
•
Granted: 1972-12-19
•
Expires: 1990-08-21
Abstract
Abstract Paint brush bristles formed from polybutylene-1,4-terephthalate exhibiting superior bend recovery and initial modulus of elasticity in flex as well as in paint solvents, satisfactory temperature dependence of modulus and amenability to flagging and tipping.
Inventors
- 👤 Dennis Edward Curtin
- 👤 John Edward Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
A; A46; A46D; A46D1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2976
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
The article of claim 1 wherein the bristles are tipped and flagged.
Claim 2
Dependent Claim
34 words
The article of claim 2 wherein the bristles are tapered and have a base from 6 to 20 mils in diameter and a minimum diameter from 0.5 to 0.75 the diameter of the base.
Claim 3
Dependent Claim
24 words
The article of claim 3 wherein the bristles have been microflagged to produce about 10-20 microhair divisions at the tipped end of the bristles.
Claim 4
Dependent Claim
45 words
A paintbrush comprising oriented, heat-set bristles of poly(butylene-1,4-terephthalate) having a minimum diameter of 3 mils and an inherent viscosity of from about 0.5 to about 1.5, as measured from a 0.5 g. solution of a solvent consisting of 40 percent tetrachloroethane and 60 percent phenol.
Claim 5
Dependent Claim
13 words
The paint brush of claim 5 wherein the bristles are tipped and flagged.
Claim 6
Dependent Claim
36 words
The paint brush of claim 5 wherein the bristles are tapered and have a maximum diameter in the range of 6 to 20 mils and a minimum diameter in the range of 3 to 15 mils.
Claim 7
Dependent Claim
25 words
The paint brush of claim 6 wherein the bristles have been microflagged to produce about 10-20 microhair divisions at the tipped end of the bristles.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |