US4132781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treatment of acne
Assignee: Whitby Research Inc
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Filing: 1974-12-19
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Granted: 1979-01-02
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Expires: 1994-12-19
Abstract
Abstract There is disclosed a topical antibacterial composition and method for topical antibiotic treatment. The method involves contacting the skin of a human or animal with an effective amount of a composition containing an antibiotic of the erythromycin family and 2-pyrrolidone or an N-lower alkyl-2-pyrrolidone. The preferred use of the foregoing composition and method is in the treatment of acne.
Inventors
- 👤 Richard B. Stoughton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:02
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/34; A61K31/70; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/4906; A61K8/4913; A61K8/60; A61K8/602; A61K9/00; A61K9/06; A61K9/08; A61K9/10; A61K9/12; A61Q3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A method for temporarily alleviating the signs and symptoms of acne comprising topically administering to human skin an effective amount of a composition comprising about 0.1 to about 10 percent by weight of an antibiotic of the erythromycin family together with about 5 to about 99.9 percent by weight of a compound selected from the group consisting of 2-pyrrolidone and an N-lower alkyl-2-pyrrolidone.
Claim 2
Independent Claim
63 words
A method for temporarily alleviating the signs and symptoms of acne comprising topically administering to human skin an effective amount of a composition comprising about 0.1 to about 10 percent by weight of an antibiotic of the erythromycin family together with about 5 to about 99.9 percent by weight of a compound selected from the group consisting of 2-pyrrolidone and an N-lower alkyl-2-pyrrolidone.
Claim 3
Independent Claim
45 words
A method for temporarily alleviating the signs and symptoms of acne comprising topically administering to humans an effective amount of a composition comprising about 1 to about 5 percent by weight of an erythromycin together with about 10 to about 50 percent by weight N-methyl-2-pyrrolidone.
Claim 4
Independent Claim
45 words
A method for temporarily alleviating the signs and symptoms of acne comprising topically administering to humans an effective amount of a composition comprising about 1 to about 5 percent by weight of an erythromycin together with about 10 to about 50 percent by weight N-methyl-2-pyrrolidone.
References Cited (Backward Citations)
US3472931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |