US4740669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric curling iron with infrared radiating curling rod surface
Assignee: Individual
•
Filing: 1986-04-11
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Granted: 1988-04-26
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Expires: 2006-04-11
Abstract
Abstract Since the hair well absorbs far infrared radiation in the range of 5 to 10 μm, a material for radiating the far infrared rays having such a wavelength band, more specifically, ceramics, such as zirconia magnetite or alumina, is used on the outer surface of a rod of a curling iron. By applying a ceramic which can radiate far infrared rays to a rod of a curling iron, the temperature of the rod may be decreased to a level from 100° C. to 150° C. The ceramic layer is further coated on its outer surface with a metallic anti-corrosion layer of nickel-chrome or nickel-aluminum to withstand chemicals.
Inventors
- 👤 Toyosaku Takimae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:07
CPC Classifications
A; A45; A45D; A45D1/00; A45D1/02; A45D1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A curling iron in which the hair is rolled about or clamped, said curling iron comprising: a handle; a rod fixed to one end of said handle; a heating member encased in said rod for heating said rod to a temperature suitable for forming a permanent wave, straightening out fuzzy hair and hair setting, said rod having an outer surface which is formed of a ceramic material capable of radiating far infrared rays principally having a wavelength of 5 to 10 μm, said heating member heating said rod to 100° C. to 150° C.
Claim 2
Dependent Claim
94 words
A curling iron in which the hair is rolled about or clamped, said curling iron comprising: a handle; a rod fixed to one end of said handle; a heating member encased in said rod for heating said rod to a temperature suitable for forming a permanent wave, straightening out fuzzy hair and hair setting, said rod having an outer surface which is formed of a ceramic material capable of radiating far infrared rays principally having a wavelength of 5 to 10 μm, said heating member heating said rod to 100° C. to 150° C.
Claim 3
Dependent Claim
43 words
The curling iron as set forth in claim 1 wherein said outer surface of said rod is coated with a ceramic far infrared ray radiation layer principally emitting a wavelength of 5 to 10 μm to form said outer surface of said rod.
Claim 4
Dependent Claim
34 words
The curling iron as set forth in claim 2, wherein said outer surface of said ceramic far infrared ray radiation layer is provided with an anti-corrosion layer on said far infrared ray radiation layer.
Claim 5
Dependent Claim
24 words
The curling iron as set forth in claim 1, wherein said ceramic far infrared ray radiation material comprises ceramic whose main component is alumina.
Claim 6
Dependent Claim
23 words
The curling iron as set forth in claim 1, wherein said ceramic far infrared radiation material comprises ceramic whose main component is zirconia.
References Cited (Backward Citations)
DE934603C
Cited
JPS5027907A
Cited
US4151850A
Cited
DE2720961A1
Cited
DE2819725A1
Cited
JPS5521852A
Cited
JPS5533595A
Cited
US4426570A
Cited
US4365140A
Cited
US4464562A
Cited
US4602143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |