US5358935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonantigenic keratinous protein material
Assignee: Keraplast Technologies Ltd
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Filing: 1992-11-19
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Granted: 1994-10-25
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Expires: 2012-11-19
Abstract
Abstract The present invention is a new nonantigenic keratinous protein material that may be used as a number of purposes, including correction of soft tissue deficiencies and the creation of biomedical implants and implant coatings. The present invention also includes processes for using the nonantigenic keratinous protein material for soft tissue augmentation, creating implants, and the coating of biocompatible implants. The nonantigenic keratinous protein material can be formed by obtaining nonantigenic keratinous protein and processing it to a powder form. If hair from the recipient or a compatible doner is used, it is bleached and rinsed, then dried and chopped into about 0.25 inch pieces. The keratinous protein is then homogenized in a solvent to a particular size generally in the range of about 0.1 to about 500 μm. The particles are then ultrasonicated in a solvent. Afterwards, the solvent is evaporated, and the powdered protein is sterilized and suspended in a sterile bioinert solvent to create a protein colloid at a solids concentrations suitable for injection.
Inventors
- 👤 Robert A. Smith
- 👤 Cheryl R. Blanchard
- 👤 James Lankford, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/46; C07K14/47; C07K14/4701; C07K14/4741; A; A61; A61L; A61L27/00; A61L27/14; A61L27/22; A61L27/227; A61L27/26; A61L27/28; A61L27/34; A61L27/40; A61L27/44; A61L27/50; A61K; A61K38/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/842; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
54 words
A nonantigenic implant material comprising: (a) a nonantigenic keratinous protein processed to a powder form; (b) a biocompatible material combined with the processed keratinous protein to provide a nonantigenic interface between an implant recipient's tissue and the biocompatible material; and (c) said processed keratinous material is coated onto the surface of the biocompatible material.
Claim 2
Dependent Claim
54 words
A nonantigenic implant material comprising: (a) a nonantigenic keratinous protein processed to a powder form; (b) a biocompatible material combined with the processed keratinous protein to provide a nonantigenic interface between an implant recipient's tissue and the biocompatible material; and (c) said processed keratinous material is coated onto the surface of the biocompatible material.
Claim 3
Dependent Claim
29 words
The nonantigenic implant material according to claim 1 in which the biocompatible material is selected from the group consisting of HDPE, silicone, Teflon®, aluminum oxide, zirconium oxide, and hydroxyapatite.
Claim 4
Dependent Claim
73 words
A process for preparing a nonantigenic protein colloid for soft tissue augmentation comprising the steps of: (a) processing a nonantigenic keratinous protein from a compatible donor to a powder form; (b) suspending the powdered protein in a sterilized bioinert carrier to create a protein colloid at a solids concentration in the range of 30 to 70 percent by volume that is suitable for injection; and (c) injecting the protein colloid into a recipient.
Claim 5
Dependent Claim
73 words
A process for preparing a nonantigenic protein colloid for soft tissue augmentation comprising the steps of: (a) processing a nonantigenic keratinous protein from a compatible donor to a powder form; (b) suspending the powdered protein in a sterilized bioinert carrier to create a protein colloid at a solids concentration in the range of 30 to 70 percent by volume that is suitable for injection; and (c) injecting the protein colloid into a recipient.
Claim 6
Dependent Claim
20 words
The process of claim 3 wherein the compatible donor in step (a) is also the recipient of the protein colloid.
Claim 7
Dependent Claim
22 words
A process of claim 3 wherein the keratinous protein in step (a) is selected from the group consisting of hair and nails.
Claim 8
Dependent Claim
46 words
A process for soft tissue augmentation using the process for preparing a nonantigenic protein colloid of claim 3 comprising the additional steps of: (a) loading an injection apparatus with the protein colloid; and (b) injecting the protein colloid into a soft tissue area of a recipient.
Claim 9
Dependent Claim
145 words
(Amended) A process for preparing a nonantigenic protein colloid for soft tissue augmentation comprising the steps of: (a) bleaching hair obtained from a compatible donor; (b) rinsing the bleached hair in a soap solution and deionized water to remove the bleaching agent; (c) drying the rinsed hair for about 1.5 hours at about 75° C.; (d) chopping the dried hair to about 0.25 inch pieces; (e) homogenizing the chopped hair in a cooled solvent to a particle size in the range of about 0.1 μm to about 500 μm; (f) sonicating the homogenized hair in a cooled solvent; (g) evaporating the solvent to leave a powdered hair residue; (h) sterilizing the powdered hair residue; and (i) suspending the sterilized powdered hair residue in a sterilized bioinert carrier to create a colloid with a solids concentration in the range of 30 to 70 percent by volume.
Claim 10
Dependent Claim
145 words
(Amended) A process for preparing a nonantigenic protein colloid for soft tissue augmentation comprising the steps of: (a) bleaching hair obtained from a compatible donor; (b) rinsing the bleached hair in a soap solution and deionized water to remove the bleaching agent; (c) drying the rinsed hair for about 1.5 hours at about 75° C.; (d) chopping the dried hair to about 0.25 inch pieces; (e) homogenizing the chopped hair in a cooled solvent to a particle size in the range of about 0.1 μm to about 500 μm; (f) sonicating the homogenized hair in a cooled solvent; (g) evaporating the solvent to leave a powdered hair residue; (h) sterilizing the powdered hair residue; and (i) suspending the sterilized powdered hair residue in a sterilized bioinert carrier to create a colloid with a solids concentration in the range of 30 to 70 percent by volume.
Claim 11
Dependent Claim
11 words
A nonantigenic protein colloid produced by the process of claim 7.
Claim 12
Dependent Claim
46 words
A process for soft tissue augmentation using the process for preparing a nonantigenic protein colloid of claim 3 comprising the additional steps of: (a) loading an injection apparatus with the protein colloid; and (b) injecting the protein colloid into a soft tissue area of a recipient.
Claim 13
Dependent Claim
52 words
A process for preparing and implanting a nonantigenic implant comprising the steps of: (a) processing a compatible nonantigenic keratinous protein to a powder form; (b) coating the powder form keratinous protein onto the surface of a biocompatible implant material; and (c) implanting said keratinous powder coated nonantigenic composite implant into a recipient.
Claim 14
Dependent Claim
52 words
A process for preparing and implanting a nonantigenic implant comprising the steps of: (a) processing a compatible nonantigenic keratinous protein to a powder form; (b) coating the powder form keratinous protein onto the surface of a biocompatible implant material; and (c) implanting said keratinous powder coated nonantigenic composite implant into a recipient.
Claim 15
Dependent Claim
28 words
A process of claim 10 wherein the biocompatible material of step (b) is selected from the group consisting of HDPE, silicone, Teflon®, aluminum oxide, zirconium oxide, and hydroxyapatite.
Claim 16
Dependent Claim
44 words
A process for preparing a nonantigenic implant comprising the steps of: (a) processing a nonantigenic keratinous protein to a powder form; and (b) bonding the nonantigenic keratinous protein powder prepared in step (a) by pressure treatment into the form of a solid monolithic implant.
Claim 17
Dependent Claim
44 words
A process for preparing a nonantigenic implant comprising the steps of: (a) processing a nonantigenic keratinous protein to a powder form; and (b) bonding the nonantigenic keratinous protein powder prepared in step (a) by pressure treatment into the form of a solid monolithic implant.
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |