US4876084A
Expired / Lapsed
US
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P-hydroxycinnamamide derivatives and melanin inhibitor comprising the same
Assignee: Kao Corp
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Filing: 1987-07-23
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Granted: 1989-10-24
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Expires: 2007-07-23
Abstract
Abstract A novel melanin inhibitor comprising as an active component a p-hydroxycinnamamide derivative of the following general formula (I) ##STR1## in which R 1 represents a hydrogen atom or a 2-hydroxyethyl group, and R 2 represents a hydroxymethyl group or a carboxyl group. The melanin inhibitor may take various forms such as a lotion, an emulsion, a cream, an ointment, a gel and the like, and it is locally applied onto affected parts such as spots and freckles on the skin, and a pigmental deposition after sunburn.
Inventors
- 👤 Kimihiko Hori
- 👤 Koichi Nakamura
- 👤 Michio Kawai
- 👤 Itsuro Motegi
- 👤 Genji Imokawa
- 👤 Naotake Takaishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:00
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; A61Q; A61Q17/00; A61Q17/04; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A p-hydroxycinnamamide derivative of the following formula (II) ##STR8## in which R 1 represents a hydrogen atom or a 2-hydroxyethyl group.
Claim 2
Dependent Claim
21 words
A p-hydroxycinnamamide derivative of the following formula (II) ##STR8## in which R 1 represents a hydrogen atom or a 2-hydroxyethyl group.
Claim 3
Dependent Claim
30 words
A melanin inhibitor composition, comprising: an active component of a p-hydroxycinnamamide derivative of the formula: ##STR9## wherein R 1 is hydrogen or a 2-hydroxyethyl group in a cosmetically acceptable vehicle.
Claim 4
Dependent Claim
30 words
A melanin inhibitor composition, comprising: an active component of a p-hydroxycinnamamide derivative of the formula: ##STR9## wherein R 1 is hydrogen or a 2-hydroxyethyl group in a cosmetically acceptable vehicle.
References Cited (Backward Citations)
DE2015447A1
Cited
FR2545355A1
Cited
GB2141626A
Cited
GB2150436A
Cited
JPS6219510A
Cited
JPS6256459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |