US4161050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair brush
Assignee: Kao Corp
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Filing: 1978-06-26
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Granted: 1979-07-17
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Expires: 1998-06-26
Abstract
Abstract A hair brush having bristles of at least two different lengths projecting from the hair brush body. The longer bristles have enlarged, substantially spherical ends, the diameters of which are larger than the nominal diameters of the bristles.
Inventors
- 👤 Tetsuo Sasaki
- 👤 Yoshimi Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:01
CPC Classifications
A; A46; A46D; A46D1/00; A46D1/02; A46D1/0284; A46B; A46B9/00; A46B9/02; A46B9/023; A46B2200/00; A46B2200/10; A46B2200/104; Y; Y10; Y10S; Y10S15/00; Y10S15/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
209 words
A hair brush comprising: a brush body; a plurality of discrete, spaced-apart, tufts of bristles whose inner ends are secured to said brush body and which project away from said brush body, said tufts being arranged on said brush body so that the total number of bristles per unit area of the brushing surface is from 8 to 30 bristles/cm 2 , each tuft consisting essentially of approximately equal numbers of long bristles of substantially equal length and short bristles, said long and short bristles being substantially uniformly distributed in each tuft, each tuft containing a total of from 2 to 6 bristles, each bristle having a diameter of from 0.45 to 0.70 mm and projecting from the brush body a distance of from 15 to 30 mm, said short bristles projecting from said brush body a distance which is from 1 to 10 mm shorter than the distance said long bristles project from said brush body so that the outer ends of said short bristles are located inwardly from the outer ends of said long bristles, said long bristles having enlarged substantially spherical outer ends wherein the diameters of said outer ends are from 1.2 to 2.5 times larger than the diameters of the remainders of said bristles.
Claim 2
Dependent Claim
209 words
A hair brush comprising: a brush body; a plurality of discrete, spaced-apart, tufts of bristles whose inner ends are secured to said brush body and which project away from said brush body, said tufts being arranged on said brush body so that the total number of bristles per unit area of the brushing surface is from 8 to 30 bristles/cm 2 , each tuft consisting essentially of approximately equal numbers of long bristles of substantially equal length and short bristles, said long and short bristles being substantially uniformly distributed in each tuft, each tuft containing a total of from 2 to 6 bristles, each bristle having a diameter of from 0.45 to 0.70 mm and projecting from the brush body a distance of from 15 to 30 mm, said short bristles projecting from said brush body a distance which is from 1 to 10 mm shorter than the distance said long bristles project from said brush body so that the outer ends of said short bristles are located inwardly from the outer ends of said long bristles, said long bristles having enlarged substantially spherical outer ends wherein the diameters of said outer ends are from 1.2 to 2.5 times larger than the diameters of the remainders of said bristles.
Claim 3
Dependent Claim
53 words
A hair brush according to claim 1, wherein the number of bristles per unit area is from 12 to 20 bristles/cm 2 , and the long bristles project from said brush body a distance which is from 2 to 5 mm longer than the distance said short bristles project from said brush body.
Claim 4
Dependent Claim
79 words
A hair brush according to claim 1, in which the bristles are defined by the upstanding legs of U-shaped filaments whose bights are embedded in the brush body, and wherein the lengths of the two legs of each filament are substantially equal whereby the long bristles are provided by U-shaped filaments of one length and the short bristles are provided by U-shaped filaments of shorter length, each tuft having a total of 2 long bristles and 2 short bristles.
Claim 5
Dependent Claim
64 words
A hair brush according to claim 1, in which the bristles are defined by the upstanding legs of U-shaped filaments whose bights are embedded in the brush body, the filaments being substantially identical and each filament having one long leg defining a long bristle and short leg defining a short bristle, each tuft having a total of 2 long bristles and 2 short bristles.
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) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |