US5137533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair implantation structure
Assignee: Individual
•
Filing: 1991-11-22
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Granted: 1992-08-11
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Expires: 2011-11-22
Abstract
Abstract A structure for implantation below the surface of the epidermis of the scalp includes a group of human hair shafts embedded within a non-hydrophilic core. The core is surrounded by a cylindrical annulus of hydrophilic material which possesses a property of volumetric expansion of at least two fold after fixation within the human scalp. Through such expansion an artificial arch or within the scalp is obtained.
Inventors
- 👤 Vincent C. Giampapa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:08
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A hair implantation structure for insertion below the surface of the epidermis of the scalp, the structure comprising: (a) a multiplicity of human hair shafts, said shafts embedded in a core of substantially non-hydrophilic material; and (b) an annulus of tissue-compatible hydrophilic material having an outer surface surrounding said non-hydrophilic core, said hydrophilic annulus having a property of hydrophilic volumetric expansion of at least two fold, whereby, upon implantation of said structure within the human scalp, fixation of the outer surface of said hydrophilic annulus will be effected by the expansion of the tissue-compatible material of said annulus.
Claim 2
Dependent Claim
98 words
A hair implantation structure for insertion below the surface of the epidermis of the scalp, the structure comprising: (a) a multiplicity of human hair shafts, said shafts embedded in a core of substantially non-hydrophilic material; and (b) an annulus of tissue-compatible hydrophilic material having an outer surface surrounding said non-hydrophilic core, said hydrophilic annulus having a property of hydrophilic volumetric expansion of at least two fold, whereby, upon implantation of said structure within the human scalp, fixation of the outer surface of said hydrophilic annulus will be effected by the expansion of the tissue-compatible material of said annulus.
Claim 3
Dependent Claim
14 words
The structure as recited in claim 1 in which said core comprises cylindrical core.
Claim 4
Dependent Claim
14 words
The structure as recited in claim 1 in which said core comprises elliptical core.
Claim 5
Dependent Claim
21 words
The structure as recited in claim 1 in which said core comprises silicone and in which said annulus comprises poly-2-hydroxy ethylmethylacrate.
Claim 6
Dependent Claim
26 words
The structure as recited in claim 1 in which said human hair filaments are provided with a coating of silicone prior to embedding in said core.
Claim 7
Dependent Claim
22 words
The structure as recited in claim 1 in which said multiplicity of hair shafts are taken from the scalp of a patient.
Claim 8
Dependent Claim
18 words
The structure as recited in claim 1 further comprising a pressure bond between said core and said annulus.
Claim 9
Dependent Claim
18 words
The structure as recited in claim 6, further comprising a pressure bond between said core and said annulus.
References Cited (Backward Citations)
FR2372621A1
Cited
US4969903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |