Patent US4668516A successfully refreshed from Google Patents.
US4668516A
Expired / Lapsed
US
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Composition for regenerating the collagen of connective skin tissue and a process for its preparation
Assignee: Individual
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Filing: 1984-03-23
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Granted: 1987-05-26
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Expires: 2004-03-23
Abstract
Abstract A composition for regenerating the collagen of the connective tissue of the skin contains an aqueous conifer bark extract buffered to a pH of about 7, water-soluble flavonols and vitamin C. It is particularly useful for treating wrinkles.
Inventors
- 👤 Alain Duraffourd
- 👤 Jean-Max Duraffourd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:53
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/37; A61K8/49; A61K8/4973; A61K8/498; A61K8/67; A61K8/676; A61K8/96; A61K8/97; A61K8/9755; A61K8/9761; A61K8/9767; A61K8/9783; A61K8/9789; A61Q; A61Q19/00; A61K2800/00; A61K2800/40; A61K2800/52; A61K2800/522; A61Q19/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A composition for regenerating the collagen of the connective tissue of the skin, containing an aqueous extract of at least one member selected from the group consisting of bark and needles of pine and cypress, said extract containing buffer in an amount sufficient to maintain the pH of said extract at about 7, water-soluble flavonols in the form of dimers and vitamin C in an amount of about 10 mg per gram of flavonols, said composition having between 1 and 5 g per liter of said flavonols.
Claim 2
Dependent Claim
87 words
A composition for regenerating the collagen of the connective tissue of the skin, containing an aqueous extract of at least one member selected from the group consisting of bark and needles of pine and cypress, said extract containing buffer in an amount sufficient to maintain the pH of said extract at about 7, water-soluble flavonols in the form of dimers and vitamin C in an amount of about 10 mg per gram of flavonols, said composition having between 1 and 5 g per liter of said flavonols.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, containing a borate-based buffer and a natural anti-oxidant compatible with the other ingredients of the composition and acceptable by the skin.
Claim 4
Dependent Claim
158 words
A process for the preparation of a composition for regenerating the collagen of the connective tissue of the skin, comprising the following steps: (a) infusing pine bark with boiling water for about twenty minutes in the proportion of about 100 g bark per liter water, and then macerating said bark in water for about two hours to which alcohol has been added in a proportion of about 50 ml alcolol per liter water, (b) filtering the resulting suspension and adding an anti-oxidant and a buffer in an amount sufficient to keep the pH at a value of about 7, (c) macerating pine needles in water, in a proportion of about 100 g needles per liter water to which a buffer has been added in an amount sufficient to keep the pH at a value of about 7, and then filtering the solution, and (d) mixing the resulting filtrate with the filtrate obtained at the end of step (b).
Claim 5
Dependent Claim
158 words
A process for the preparation of a composition for regenerating the collagen of the connective tissue of the skin, comprising the following steps: (a) infusing pine bark with boiling water for about twenty minutes in the proportion of about 100 g bark per liter water, and then macerating said bark in water for about two hours to which alcohol has been added in a proportion of about 50 ml alcolol per liter water, (b) filtering the resulting suspension and adding an anti-oxidant and a buffer in an amount sufficient to keep the pH at a value of about 7, (c) macerating pine needles in water, in a proportion of about 100 g needles per liter water to which a buffer has been added in an amount sufficient to keep the pH at a value of about 7, and then filtering the solution, and (d) mixing the resulting filtrate with the filtrate obtained at the end of step (b).
Claim 6
Dependent Claim
14 words
A process according to claim 3, wherein a borate is used as said buffer.
Claim 7
Dependent Claim
14 words
A process according to claim 3, wherein ethyl gallate is used as said anti-oxidant.
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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |