Patent US2500556A successfully refreshed from Google Patents.
US4292986A
Expired / Lapsed
US
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Electric hair brush
Assignee: Capella Inc
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Filing: 1977-02-22
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Granted: 1981-10-06
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Expires: 1997-02-22
Abstract
Abstract A hair styling brush consisting of a handle and a heating element, and an open ended tube having a number of rows of radially projecting teeth extending from its outer surface, each tooth having a substantially rectangular cross section and having a length from base to apex of from 1/4" to 3/8".
Inventors
- 👤 Nevenka Ergaver
- 👤 Rayko Ergaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:13
CPC Classifications
A; A46; A46B; A46B7/00; A46B7/04; A45; A45D; A45D1/00; A45D1/18; A46B3/00; A46B3/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
In a hair styling brush having a handle and a heating element, an improved attachment therefor consisting of an open ended tube of heat conducting material securable over the heating element, a plurality of rows of radially projecting heat conducting teeth extending from the outer surface of said tube, each tooth having a base with a substantially rectangular cross section, parallel transverse faces and longitudinal edges convergent towards an apex, the length of each tooth from its base to its apex being from 1/4" to 3/8", and a non-heat conducting cap secured to the end of said tube which is furthest from said handle to prevent inadvertent burning of the person using said brush, said teeth being disposed on that portion of said tube which is adjacent to said cap.
Claim 2
Dependent Claim
130 words
In a hair styling brush having a handle and a heating element, an improved attachment therefor consisting of an open ended tube of heat conducting material securable over the heating element, a plurality of rows of radially projecting heat conducting teeth extending from the outer surface of said tube, each tooth having a base with a substantially rectangular cross section, parallel transverse faces and longitudinal edges convergent towards an apex, the length of each tooth from its base to its apex being from 1/4" to 3/8", and a non-heat conducting cap secured to the end of said tube which is furthest from said handle to prevent inadvertent burning of the person using said brush, said teeth being disposed on that portion of said tube which is adjacent to said cap.
Claim 3
Dependent Claim
17 words
The brush of claim 1, wherein each tooth has a narrow edge ending in a rounded point.
Claim 4
Dependent Claim
13 words
The brush of claim 1, wherein each tooth has a length of 5/16".
Claim 5
Dependent Claim
19 words
The brush of claim 1, wherein each row of teeth is aligned with the longitudinal axis of the tube.
Claim 6
Dependent Claim
13 words
The brush of claim 1, wherein the teeth are integral with the tube.
Claim 7
Dependent Claim
23 words
The brush of claim 1, wherein the teeth are formed on a separate sleeve, the sleeve being a friction fit over the tube.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |