Patent US3859331A successfully refreshed from Google Patents.
US3859331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dopa derivatives
Assignee: F Hoffmann La Roche AG
•
Filing: 1971-10-18
•
Granted: 1975-01-07
•
Expires: 1991-10-18
Abstract
Abstract O'', O'' diethers or diesters of L-dopa and L-dopa esters which are useful as hypotensive, anti-pyretic and anti-parkinson agents.
Inventors
- 👤 Ado Kaiser
- 👤 Wolfgang Koch
- 👤 Marcel Scheer
- 👤 Uwe Wolcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04; C07C; C07C275/00; C07C275/04; C07C275/20; C07C275/24
Claims Analysis
Total Claims: 18
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
11 words
The compound of claim 1 wherein said compound has the formula
Claim 4
Dependent Claim
10 words
The compound of claim 2 wherein said R6 is phenylalkoxy.
Claim 5
Dependent Claim
12 words
The compound of claim 3 wherein said compound is N-carbobenzoxy-0,0''-diheptanoyl-L-dopa benzyl ester.
Claim 6
Dependent Claim
12 words
The compound of claim 3 wherein said compound is N-carbobenzoxy-0,0''-dihexanoyl-L-dopa benzyl ester.
Claim 7
Dependent Claim
12 words
The compound of claim 3 wherein said compound is N-carbobenzoxy-0,0''-dibutyryl-L-dopa methyl ester.
Claim 8
Dependent Claim
9 words
The compound of claim 2 wherein R6 is alkoxy.
Claim 9
Dependent Claim
11 words
The compound of claim 1 wherein said compound has the formula
Claim 10
Dependent Claim
9 words
The compound of claim 8 wherein R6 is phenylalkoxy.
Claim 11
Dependent Claim
9 words
The compound of claim 8 wherein R6'' is alkoxy.
Claim 12
Dependent Claim
12 words
The compound of claim 10 wherein said compound is N-carbobenzoxy-0,0''-bis(ethoxycarbonyl)-L-dopa methyl ester.
Claim 13
Dependent Claim
10 words
A compound in accordance with claim 1 having the formula
Claim 14
Dependent Claim
8 words
The compound of claim 12 wherein R4 is
Claim 15
Dependent Claim
12 words
The compound of claim 12 wherein said compound is 0,0''-dipropionyl-L-dopa methyl ester.
Claim 16
Dependent Claim
12 words
The compound of claim 12 wherein said compound is 0,0''-dibutyryl-L-dopa methyl ester.
Claim 17
Dependent Claim
8 words
The compound of claim 12 wherein R4 is
Claim 18
Dependent Claim
12 words
The compound of claim 16 wherein said compound is 0,0''-bis(ethoxycarbonyl)-L-dopa methyl ester.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |