US3856822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-alkenyl dibenzo (b,d)pyrans
Assignee: GlaxoSmithKline LLC
•
Filing: 1973-07-18
•
Granted: 1974-12-24
•
Expires: 1993-07-18
Abstract
Abstract The compounds of this invention are 3-alkenyl dibenzo(b,d)pyrans having pharmacological activity such as central nervous system activity. A preferred compound of this invention is 3-(1,2dimethylhept-1-enyl)-1-hydroxy-7,8,9,10-tetrahydro-6,6,9trimethyl-6H -dibenzo(b,d)pyran.
Inventors
- 👤 P Bender
- 👤 B Loev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/055; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80
Claims Analysis
Total Claims: 6
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
52 words
A compound of claim 1 where ring A is a cyclohexene ring with the double bond at the 6a-10a position and R3 is an alkenyl group, optionally branched with from one to three methyl groups, with R3 containing one double bond and having a total of from five to 12 carbon atoms.
Claim 4
Dependent Claim
11 words
A compound of claim 2 where R2 is hydroxy or acetoxy.
Claim 5
Dependent Claim
16 words
A compound of claim 3 where R1 is methyl in the 9-position and R4 is methyl.
Claim 6
Dependent Claim
9 words
A compound of claim 4 being the compound 3-(1,2-dimethylhept-1-enyl)-1-hydroxy-7,8,9,10-tetrahydro-6,6,9-trimethyl-6H-dibenzo(b,d)pyran.
References Cited (Backward Citations)
GB651653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |