US3895034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1 OR 2-Mono and dialkyl substituted thienobenzopyrans
Assignee: Sharps Associates
•
Filing: 1973-08-29
•
Granted: 1975-07-15
•
Expires: 1993-08-29
Abstract
Abstract 1,2-Dihydro-4H-thieno-(2,3-c)(1) benzopyrans of the formulae WHEREIN R is a lower alkyl group having 1 to 5 carbons, R1 is hydrogen or a lower alkyl group having 1 to 5 carbons, R2 is a lower alkyl group and R3 is an alkyl group having 1 to 20 carbon atoms, a phenyl-lower alkyl group or a cycloalkyl-lower alkyl group. The compounds have analgesic, antihypertensive, antidepressant, anticonvulsant, antianxiety, sedative-hypnotic and/or tranquilization activity.
Inventors
- 👤 Martin Winn
- 👤 Raj Kumar Razdan
- 👤 Haldean Cloyce Dalzell
- 👤 Joyce Ruth Krei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:18
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38; C07C; C07C323/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
18 words
A compound according to claim 1 in which R3 is an alkyl having 5 to 10 carbon atoms.
Claim 4
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-1-methyl-7-(3-methyl-2-octyl)-4-oxo-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 5
Dependent Claim
10 words
A compound according to claim 1 having the name 1,2-dihydro-2,2-dimethyl-9-hydroxy-7-(3-methyl-2-octyl)-4-oxo-4H-thieno-(2,3-c)(1)benzopyran.
Claim 6
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-2,2-dimethyl-9-hydroxy-7-n-pentyl-4-oxo-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 7
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-2-methyl-7-(3-methyl-2-octyl)-4-oxo-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 8
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-2-methyl-7-n-pentyl-4-oxo-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 9
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-1,4,4-trimethyl-9-hydroxy-7-(3-methyl-2-octyl)-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 10
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-7-(3-methyl-2-octyl)-2,2,4,4-tetramethyl-4H-thieno-(2, 3-c)(1)benzopyran.
Claim 11
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-2,2,4,4-tetramethyl-7-n-pentyl-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 12
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-2,4,4-trimethyl-9-hydroxy-7-(3-methyl-2-octyl)-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 13
Dependent Claim
11 words
A compound according to claim 1 having the name 1,2-dihydro-9-hydroxy-7-n-pentyl-2,4,4-trimethyl-4H-thieno-(2,3 -c)(1)benzopyran.
Claim 14
Dependent Claim
30 words
A compound according to claim 1 in which R is methyl, R1 is hydrogen or methyl, R2 is methyl and R3 is an alkyl having 5 to 10 carbon atoms.
Claim 15
Dependent Claim
11 words
A compound according to claim 13 in which R3 is 3-methyl-2-octyl.
Claim 16
Dependent Claim
11 words
A compound according to claim 13 in which R3 is n-pentyl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |