Patent US3633235A successfully refreshed from Google Patents.
US3633235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire bristle for use in making brushes and brooms
Assignee: Individual
•
Filing: 1969-06-16
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Granted: 1972-01-11
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Expires: 1989-06-16
Abstract
Abstract The present invention relates to wire bristles for brooms and brushes in which the improvement lies in providing a wear resistant metal coating of substantial thickness at the end portion of the wire only thereby increasing the life of the bristle while avoiding undue stiffening of the bristle.
Inventors
- 👤 Cedo Draca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:28
CPC Classifications
A; A46; A46D; A46D1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
Metallic wire broom and brush bristle as claimed in claim 1, wherein a portion of said wear resistant metal coating including the end thereof and extending back therefrom has uniform thickness and the remaining length of said coating has gradually decreasing thickness.
Claim 2
Dependent Claim
22 words
Metallic wire broom and brush bristle as claimed in claim 1, wherein the thickness of said wear resistant metal is gradually decreasing.
Claim 3
Dependent Claim
31 words
Metallic wire broom and brush bristle as claimed in claim 1, wherein said metallic wire is made of a resiliently flexible steel and said wear resistant metal coating consists of chromium.
Claim 4
Dependent Claim
32 words
Metallic wire broom and brush bristle as claimed in claim 1, wherein the metallic bristle being made of stainless steel and the wear resistant metal coating thereof consisting of electrolytically deposited chromium.
Claim 5
Dependent Claim
50 words
Metallic wire broom and brush bristle having a uniformly metal coated surface and presenting a further substantial coating of a wear resistant metal disposed at one end thereof and extending longitudinally for a distance equivalent to a maximum tolerable wear of essentially one-third the freely projecting length of said bristle.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |