US3855221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyphenyl hydroxyethylaminoalkyl theophyllines
Assignee: DEUTSCHE GOLD und SILBER SCHEIDEANSTALT DT
•
Filing: 1972-08-30
•
Granted: 1974-12-17
•
Expires: 1992-08-30
Abstract
Abstract Compounds are prepared having the formula: WHERE R is methyl or hydroxymethyl, R1 is hydrogen or methyl, Alk is a propylene group which is unsubstituted or substituted by an alkyl group with 1 to 3 carbon atoms or a pharmacologically acceptable salt thereof. The compounds have good bronchospasmolytic activity.
Inventors
- 👤 K Klingler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:51
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
20 words
A compound according to claim 1, wherein not over one of R5, R6, R7, R8, R9 and R10 is alkyl.
Claim 4
Dependent Claim
13 words
A compound according to claim 2, wherein any alkyl group present is methyl.
Claim 5
Dependent Claim
10 words
A compound according to claim 3 wherein R is hyroxymethyl.
Claim 6
Dependent Claim
10 words
A compound according to claim 4, wherein R1 is hydrogen.
Claim 7
Dependent Claim
17 words
A compound according to claim 5, wherein R5, R6, R7, R8, R9 and R10 are all hydrogen.
Claim 8
Dependent Claim
19 words
A compound according to claim 5, wherein R5, R6, R7, R8 and R9 are hydrogen and R10 is methyl.
Claim 9
Dependent Claim
10 words
A compound according to claim 3, wherein R is methyl.
Claim 10
Dependent Claim
10 words
A compound according to claim 8, wherein R1 is hydrogen.
Claim 11
Dependent Claim
16 words
A compound according to claim 9, wherein R5, R6, R7, R8, R9 and R10 are hydrogen.
Claim 12
Dependent Claim
19 words
A compound according to claim 9, wherein R5, R6, R7, R8 and R9 are hydrogen and R10 is methyl.
Claim 13
Dependent Claim
10 words
A compound according to claim 8, wherein R1 is methyl.
Claim 14
Dependent Claim
17 words
A compound according to claim 12 wherein R5, R6, R7, R8, R9 and R10 are all hydrogen.
Claim 15
Dependent Claim
19 words
A compound according to claim 12, wherein R5, R6, R7, R8 and R9 are hydrogen and R10 is methyl.
References Cited (Backward Citations)
US3245994A
Cited
BE675042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |