US4611610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair curling units and their production
Assignee: Individual
•
Filing: 1985-04-03
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Granted: 1986-09-16
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Expires: 2005-04-03
Abstract
Abstract Hair curling units to be formed into a roll or to be wrapped about a member, in either case to have tresses wound about it, have two interconnected walls of flexible paper backed aluminum foil. The aluminum foil sides of the walls are the interior surfaces of the unit and the aluminum foil side of at least one wall has a dehydrated exothermic coat consisting of nitric acid and mercury partly reacted with the aluminum foil and bonded thereto. The walls may be unitary or separate blanks and in either case marginal portions remain unconnected to enable the exothermic material to be easily moistened.
Inventors
- 👤 Nunziato Schepis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:55
CPC Classifications
A; A45; A45D; A45D2/00; A45D2/36; A45D2/365
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A hair curling unit to be formed into a roll or to be wrapped about a member, in either case then to have tresses wound about it, said unit including two interconnected, rectangular walls of flexible composite sheet material having an aluminum foil side and a paper side, the aluminum foil sides the interior surfaces of the unit, the aluminul foil side of at least one wall provided with a dehydrated exothermic coat consisting of nitric acid and mercury partly reacted therewith and bonded thereto, and said walls having at least one disconnected side margin to facilitate the admittance of coat-moistening mositure whereby the exothermic coat is activated to heat the paper sides of the unit.
Claim 2
Dependent Claim
116 words
A hair curling unit to be formed into a roll or to be wrapped about a member, in either case then to have tresses wound about it, said unit including two interconnected, rectangular walls of flexible composite sheet material having an aluminum foil side and a paper side, the aluminum foil sides the interior surfaces of the unit, the aluminul foil side of at least one wall provided with a dehydrated exothermic coat consisting of nitric acid and mercury partly reacted therewith and bonded thereto, and said walls having at least one disconnected side margin to facilitate the admittance of coat-moistening mositure whereby the exothermic coat is activated to heat the paper sides of the unit.
Claim 3
Dependent Claim
13 words
The hair curling unit of claim 1 in which the coat is discontinuous.
Claim 4
Dependent Claim
23 words
The hair curling unit of claim 1 in which the aluminum foil sides of both walls are provided with said dehydrated exothermic coat.
Claim 5
Dependent Claim
14 words
The hair curling unit of claim 1 in which opposite side margins are disconnected.
Claim 6
Dependent Claim
42 words
The hair curling unit of claim 1 in which the walls are separate sections of said material and are approximately the same size and shape, one section overlying the other, and means uniting said sections along at least one of their margins.
Claim 7
Dependent Claim
19 words
The hair curling unit of claim 5 in which means unite said sections along one pair of opposite margins.
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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |