US2673850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazides of the lysergic acid series
Assignee: Sandoz AG
•
Filing: 1952-07-14
•
Granted: 1954-03-30
•
Expires: 1972-07-14
Abstract
No abstract record available.
Inventors
- 👤 Stoll Arthur
- 👤 Petrzilka Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:32
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A PROCESS FOR THE PREPARATION OF A DIHYDROLYSERGL -L,L - 1,2 - TRIMETHYLENE -5- ISOBUTYL-PIPERAZIDE FROM A PEPTIDE OF THE FORMULA
Claim 2
Dependent Claim
21 words
A PROCESS FOR THE PREPARATION OF A DIHYDROLYSERGL -L,L - 1,2 - TRIMETHYLENE -5- ISOBUTYL-PIPERAZIDE FROM A PEPTIDE OF THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |