US4345080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridinethione salts and hair care compositions
Assignee: Procter and Gamble Co
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Filing: 1980-02-07
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Granted: 1982-08-17
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Expires: 2000-02-07
Abstract
Abstract Metal salts of pyridinethione useful in shampoos, creme rinses and other hair care compositions to deliver antidandruff benefits while not detracting as much as previous pyridinethione salts from the compositions' aesthetics. Compositions containing such salts are also included.
Inventors
- 👤 Raymond E. Bolich, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; A; A61; A61K; A61K8/00; A61K8/02; A61K8/18; A61K8/30; A61K8/49; A61K8/4906; A61K8/4933; A61Q; A61Q5/00; A61Q5/006; A61Q5/02; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
Heavy metal, magnesium or aluminum salts of N-hydroxy pyridinethione which are predominately flat platelet crystals having a mean sphericity less than about 0.65 and a median equivalent spherical diameter based on volume of at least about 2μ but less than about 15μ.
Claim 2
Dependent Claim
42 words
Heavy metal, magnesium or aluminum salts of N-hydroxy pyridinethione which are predominately flat platelet crystals having a mean sphericity less than about 0.65 and a median equivalent spherical diameter based on volume of at least about 2μ but less than about 15μ.
Claim 3
Dependent Claim
23 words
Pyridinethione salts according to claim 1 wherein the metal is selected from the group consisting of zinc, tin, magnesium, aluminum, cadmium and zirconium.
Claim 4
Dependent Claim
11 words
Pyridinethione salts according to claim 2 wherein the metal is zinc.
Claim 5
Dependent Claim
18 words
Pyridinethione salts according to claim 3 wherein additionally the mean sphericity is from about 0.20 to about 0.65.
References Cited (Backward Citations)
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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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |