Patent US2555559A successfully refreshed from Google Patents.
Patent US3957994A successfully refreshed from Google Patents.
US3957994A
Expired / Lapsed
US
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Topical anti-inflammatory composition and method of use
Assignee: Whitby Research Inc
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Filing: 1974-12-19
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Granted: 1976-05-18
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Expires: 1994-12-19
Abstract
Abstract There is disclosed a novel topical anti-inflammatory composition comprising theophylline and 2-pyrrolidone or an N-lower alkyl-2-pyrrolidone.
Inventors
- 👤 Richard Allen Schroer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:54
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/519; A61K31/52; A61K47/00; A61K47/06; A61K47/22; A61K9/00; A61K9/0012; A61K9/0014
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
A composition useful in the treatment of inflammation of the skin comprising about 0.1 to about 1 percent by weight of theophylline together with about 5 to about 99.9 percent by weight of 2-pyrrolidone or N-lower alkyl-2-pyrrolidone.
Claim 2
Dependent Claim
37 words
A composition useful in the treatment of inflammation of the skin comprising about 0.1 to about 1 percent by weight of theophylline together with about 5 to about 99.9 percent by weight of 2-pyrrolidone or N-lower alkyl-2-pyrrolidone.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the N-lower alkyl substituent has 1-4 carbon atoms.
Claim 4
Dependent Claim
11 words
A composition of claim 1 wherein the N-lower alkyl-2-pyrrolidone is N-methyl-2-pyrrolidone.
Claim 5
Dependent Claim
29 words
A composition useful in the treatment of inflammation of the skin comprising about 0.3 theophylline and a topical carrier containing about 10 to about 50 percent by weight N-methyl-2-pyrrolidone.
Claim 6
Dependent Claim
29 words
A composition useful in the treatment of inflammation of the skin comprising about 0.3 theophylline and a topical carrier containing about 10 to about 50 percent by weight N-methyl-2-pyrrolidone.
Claim 7
Independent Claim
57 words
A method for temporarily alleviating the symptoms of inflammation of the skin in humans and animals comprising topically administering to a human or animal an effective amount of a composition containing about 0.1 to about 1 percent by weight of theophylline together with about 5 to about 99.9 percent by weight of 2-pyrrolidone or an N-lower alkyl-2-pyrrolidone.
Claim 8
Independent Claim
57 words
A method for temporarily alleviating the symptoms of inflammation of the skin in humans and animals comprising topically administering to a human or animal an effective amount of a composition containing about 0.1 to about 1 percent by weight of theophylline together with about 5 to about 99.9 percent by weight of 2-pyrrolidone or an N-lower alkyl-2-pyrrolidone.
Claim 9
Dependent Claim
15 words
The method of claim 5 wherein the N-lower alkyl substituent has 1- 4 carbon atoms.
Claim 10
Dependent Claim
11 words
The method of claim 5 wherein the N-lower alkyl-2-pyrrolidone is N-methyl-2-pyrrolidone.
Claim 11
Independent Claim
53 words
A method for temporarily alleviating the symptoms of inflammation of the skin in humans and animals comprising topically administering to a human or animal an effective amount of a composition containing about 0.3 percent by weight of theophylline and a topical carrier containing about 10 to about 50 percent by weight of N-methyl-2-pyrrolidone.
Claim 12
Independent Claim
53 words
A method for temporarily alleviating the symptoms of inflammation of the skin in humans and animals comprising topically administering to a human or animal an effective amount of a composition containing about 0.3 percent by weight of theophylline and a topical carrier containing about 10 to about 50 percent by weight of N-methyl-2-pyrrolidone.
Claim 13
Dependent Claim
10 words
The method of claim 5 wherein the inflammation is sunburn.
Claim 14
Dependent Claim
10 words
The method of claim 8 wherein the inflammation is sunburn.
References Cited (Backward Citations)
US3457263A
Cited
US3472931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |