US4381791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent wave mandrel device for hair
Assignee: PERM-EZ Inc A CORP OF FLORIDA
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Filing: 1980-09-26
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Granted: 1983-05-03
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Expires: 2000-09-26
Abstract
Abstract An improved permanent wave, mandrel device for hair, in which a small diameter rod forms a mandrel for rolling a tight curl of hair, the hair curl being pressed against the rods by an elastic cord stretched from one end of the rod to the other, and in which the improvement embodies the addition of a sponge member, preferably in the form of a cylinder surrounding the elastic cord and a portion of which is positioned between the cord and the curled hair to distribute the applied pressure more widely and prevents breakage of hair strands.
Inventors
- 👤 Jean Van Sickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:00
CPC Classifications
A; A45; A45D; A45D2/00; A45D2/12; A45D2/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A permanent wave, mandrel device for hair, comprising a rod having an outside surface on which hair is to be rolled to form a curl, an elongated pressure element extending along said rod and adapted to press the hair curl tightly against the outside surface of the rod to thereby maintain said hair in a curl about said rod, and a pad adapted to be positioned between the pressure element and the outside surface of the curl and extending substantially along the length of said rod to cushion the pressure applied to the outside surface of the curl by the pressure element so as to prevent damage to hair strands.
Claim 2
Dependent Claim
110 words
A permanent wave, mandrel device for hair, comprising a rod having an outside surface on which hair is to be rolled to form a curl, an elongated pressure element extending along said rod and adapted to press the hair curl tightly against the outside surface of the rod to thereby maintain said hair in a curl about said rod, and a pad adapted to be positioned between the pressure element and the outside surface of the curl and extending substantially along the length of said rod to cushion the pressure applied to the outside surface of the curl by the pressure element so as to prevent damage to hair strands.
Claim 3
Dependent Claim
33 words
A permanent wave device according to claim 1, wherein said pressure element is an elastic cord having two ends and extending from near one end of the rod to near the other end.
Claim 4
Dependent Claim
17 words
A permanent wave device according to claim 2, wherein said pad is made of a sponge material.
Claim 5
Dependent Claim
18 words
A permanent wave device according to claim 3, wherein said pad is a cylinder which encircles said cord.
Claim 6
Dependent Claim
15 words
A permanent wave device according to claim 3, wherein said pad is made of rubber.
Claim 7
Dependent Claim
16 words
A permanent wave device according to claim 3, wherein said pad is made of plastic foam.
Claim 8
Dependent Claim
17 words
A permanent wave device according to claim 3 wherein said rod is a tube made of plastic.
Claim 9
Dependent Claim
44 words
A permanent wave device according to claim 7, wherein said rod has a central portion having a small diameter and end portions having larger diameters, and means for removably securing each of said ends of said elastic cord to each of said end portions.
Claim 10
Dependent Claim
55 words
A permanent wave device according to claim 8, wherein said means for securing has a pair of adjacent slots of different widths at each end of the rod, the slot of smaller width passing the elastic cord therethrough and the slot of larger width passing and holding an enlargement on the end of the cord.
Claim 11
Dependent Claim
35 words
A permanent wave device according to claim 9, wherein one of said pairs of slots is formed in a plug member which fits into a bore in the enlargement at one end of the rod.
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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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |