US4544556A
Expired / Lapsed
US
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Xanthine derivatives, pharmaceutical compositions containing same and their therapeutic use
Assignee: Malesci Instituto Farmacobiologico SpA
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Filing: 1983-08-04
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Granted: 1985-10-01
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Expires: 2003-08-04
Abstract
Abstract Alkyl-substituted xanthines having a prevailingly peripheral theophylline-assimilated activity, process for their preparation, pharmaceutical compositions containing said xanthines and their therapeutic use.
Inventors
- 👤 Mauro Fedi
- 👤 Graziano Bonacchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A compound of the formula ##STR3## wherein R 1 =H; CH 3 R 3 =C n H 2n+1 R 8 =H; CH 3 n is 1 to 5.
Claim 2
Dependent Claim
28 words
A compound of the formula ##STR3## wherein R 1 =H; CH 3 R 3 =C n H 2n+1 R 8 =H; CH 3 n is 1 to 5.
Claim 3
Dependent Claim
14 words
Compound according to claim 1, wherein R 1 =R 3 =methyl; R 8 =H.
Claim 4
Dependent Claim
15 words
Compound according to claim 1, wherein R 1 =methyl, R 3 =isobutyl, R 8 =H.
Claim 5
Dependent Claim
15 words
Compound according to claim 1, wherein R 1 =methyl, R 3 =2-methylbutyl, R 8 =H.
Claim 6
Dependent Claim
15 words
Compound according to claim 1, wherein R 1 =methyl, R 3 =2-methylbutyl, R 8 =methyl.
Claim 7
Dependent Claim
14 words
Compound according to claim 1, wherein R 1 =R 8 =H, R 3 =n-propyl.
Claim 8
Dependent Claim
51 words
A pharmaceutical composition containing an effective quantity of a compound of the formula ##STR4## wherein R 1 =H; CH 3 R 3 =C n H 2n+1 R 8 =H; CH 3 n is 1 to 5, in combination with an inert pharmaceutically acceptable carrier to produce an antibronchospastic or antiphosphodiesterase effect.
Claim 9
Dependent Claim
51 words
A pharmaceutical composition containing an effective quantity of a compound of the formula ##STR4## wherein R 1 =H; CH 3 R 3 =C n H 2n+1 R 8 =H; CH 3 n is 1 to 5, in combination with an inert pharmaceutically acceptable carrier to produce an antibronchospastic or antiphosphodiesterase effect.
Claim 10
Dependent Claim
15 words
Pharmaceutical composition according to claim 7, wherein R 1 =R 3 =methyl; R 8 =H.
Claim 11
Dependent Claim
16 words
Pharmaceutical composition according to claim 7, wherein R 1 =methyl, R 3 =isobutyl, R 8 =H.
Claim 12
Dependent Claim
16 words
Pharmaceutical composition according to claim 7, wherein R 1 =methyl, R 3 =2-methylbutyl, R 8 =H.
Claim 13
Dependent Claim
16 words
Pharmaceutical composition according to claim 7, wherein R 1 =methyl, R 3 =2-methybutyl, R 8 =methyl.
Claim 14
Dependent Claim
15 words
Pharmaceutical composition according to claim 7, wherein R 1 =R 8 =H, R 3 =n-propyl.
References Cited (Backward Citations)
US4299833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |