US2713574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New syntheses of peptides and substituted amides
Assignee: Wyeth Holdings LLC
•
Filing: 1951-05-24
•
Granted: 1955-07-19
•
Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr James R Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:00
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/06; C07K5/06086; C07K1/00; C07K1/06; C07K1/061; C07K1/063; C07K1/064; C07K1/08; C07K5/10; C07K5/1002; C07K5/1005; C07K5/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN A METHOD OF PREPARING AMIDES WHEREIN A COMPOUND HAVING AN AMINO GROUP CAPABLE OF BEING ACYLATED IS REACTED WITH A MIXED ANHYDRIDE OF AN N-ACYLATED AMINOACID, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A MIXED ANHYDRIDE OF AN ALKYL CARBONIC ACID.
Claim 2
Dependent Claim
40 words
IN A METHOD OF PREPARING AMIDES WHEREIN A COMPOUND HAVING AN AMINO GROUP CAPABLE OF BEING ACYLATED IS REACTED WITH A MIXED ANHYDRIDE OF AN N-ACYLATED AMINOACID, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A MIXED ANHYDRIDE OF AN ALKYL CARBONIC ACID.
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) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |