Patent US4508634A successfully refreshed from Google Patents.
US4508634A
Expired / Lapsed
US
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Aqueous skin cleaner composition comprising propylene carbonate
Assignee: 3M Co
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Filing: 1983-11-15
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Granted: 1985-04-02
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Expires: 2003-11-15
Abstract
Abstract Composition suitable for removing paint, grease, dirt and other foreign materials from the skin. The composition comprises propylene carbonate, water, at least one organic cosolvent, at least one thickening agent, at least one neutralizing agent, and at least one surfactant. In a preferred embodiment, the composition further includes a mild abrasive, wood flour, to promote the cleaning action of the propylene carbonate.
Inventors
- 👤 Normita P. Elepano
- 👤 William H. Schnur
- 👤 Jens L. Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/4973; A61K8/96; A61K8/97; A61K8/9706; A61K8/9717; A61K8/9783; A61K8/9789; C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/382; C11D3/43; A61K2800/00; A61K2800/20; A61K2800/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A composition useful for removing paint, primer grease, dirt from the surface of skin comprising: (a) from about 10% to about 40% by weight propylene carbonate, (b) from about 10% to about 50% by weight water, (c) from about 1% to about 30% by weight at least one cosolvent, (d) from about 0.5% to about 12% by weight at least one surfactant, (e) from about 0.1% to about 5% by weight at least one thickening agent, (f) from about 0.01% to about 1% by weight at least one buffering agent, and (g) from 0% to about 15% by weight at least one abrasive material.
Claim 2
Dependent Claim
104 words
A composition useful for removing paint, primer grease, dirt from the surface of skin comprising: (a) from about 10% to about 40% by weight propylene carbonate, (b) from about 10% to about 50% by weight water, (c) from about 1% to about 30% by weight at least one cosolvent, (d) from about 0.5% to about 12% by weight at least one surfactant, (e) from about 0.1% to about 5% by weight at least one thickening agent, (f) from about 0.01% to about 1% by weight at least one buffering agent, and (g) from 0% to about 15% by weight at least one abrasive material.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said at least one abrasive material is wood flour.
Claim 4
Dependent Claim
11 words
The composition of claim 1 further including at least one emollient.
Claim 5
Dependent Claim
27 words
A method for removing paint, primer, grease, dirt from the skin comprising rubbing the skin with an effective amount of the skin cleaning composition of claim 1.
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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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |