Patent US4818520A successfully refreshed from Google Patents.
US4818520A
Expired / Lapsed
US
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Keratin hydrolysate formulations and methods of preparation thereof
Assignee: Individual
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Filing: 1986-10-15
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Granted: 1989-04-04
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Expires: 2006-10-15
Abstract
Abstract Keratin protein hydrolysate products, which are prepared from keratin-containing animal parts, such as fowl feathers and the like, the product being useful as an anti-skin blemisher, moisturizer, skin mask, shampoo enhancer, shaving lotion and nail hardener and conditioner, and method of preparation of the products.
Inventors
- 👤 Albert M. Fleischner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/65; A61K8/96; A61K8/98; A61K8/981; A61K8/985; A61Q5/00; A61Q5/02; A61Q15/00; A61Q3/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
The method of preparing a neutralized viscous liquid proteinaceous extract which is useful as a skin conditioner, shampoo and the like, comprising the steps of heating an aqueous mixture of avian feathermeal and alkaline material; refluxing said mixture for several hours at 100 degrees C. under one atmosphere of pressure; thereafter cooling the refluxed solution and filtering said solution to recover a proteinaceous extract; adding sufficient sulfuric acid to extract to reduce the pH to 3.0; removing the precipitate formed during acidification of the extract by vacuum filtration; then heating and evaporating approximately one half by volume of the resultant concentrated viscous filtrate; adding sufficient alkali hydroxide to said viscous filtrate to neutralize the same to a pH of 7.0; and finally storing said proteinaceous extract at room temperature, and thereafter re-heating the said extract to re-dissolve precipitate material to produce a clear viscous liquid lotion.
Claim 2
Independent Claim
146 words
The method of preparing a neutralized viscous liquid proteinaceous extract which is useful as a skin conditioner, shampoo and the like, comprising the steps of heating an aqueous mixture of avian feathermeal and alkaline material; refluxing said mixture for several hours at 100 degrees C. under one atmosphere of pressure; thereafter cooling the refluxed solution and filtering said solution to recover a proteinaceous extract; adding sufficient sulfuric acid to extract to reduce the pH to 3.0; removing the precipitate formed during acidification of the extract by vacuum filtration; then heating and evaporating approximately one half by volume of the resultant concentrated viscous filtrate; adding sufficient alkali hydroxide to said viscous filtrate to neutralize the same to a pH of 7.0; and finally storing said proteinaceous extract at room temperature, and thereafter re-heating the said extract to re-dissolve precipitate material to produce a clear viscous liquid lotion.
Claim 3
Dependent Claim
13 words
The method of claim 21 wherein the alkaline reflux solution comprises strontium hydroxide.
Claim 4
Dependent Claim
20 words
The method of claim 21 wherein the alkaline reflux extract material comprises a fibrous keratin which contains water soluble peptides.
Claim 5
Dependent Claim
16 words
The method of claim 21 wherein the viscous liquid is admixed with detergents and methyl parabin.
Claim 6
Dependent Claim
16 words
The method of claim 21 wherein the viscous liquid comprises a mixture of detergents and preservatives.
Claim 7
Dependent Claim
15 words
The method of claim 21 wherein the proteinaceous extract material comprises a naturally occurring cystine-cysteine.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |