Patent US3778428A successfully refreshed from Google Patents.
US3778428A
Expired / Lapsed
US
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Process for the production of peptides
Assignee: Sankyo Co Ltd
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Filing: 1971-12-20
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Granted: 1973-12-11
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Expires: 1991-12-20
Abstract
Abstract PROCESS FOR THE PREPARATION OF A PEPTIDE BY REACTING AN ALIPHATIC OR AROMATIC CRBOXYLIC ACID WITH AN ALIPHATIC OR AROMATIC AMINE IN AN ORGANIC SOLVENT IN THE PRESENCE OF AN ORGANOMETALLIC COMPOUND OF MERCURY AND AN AROMATIC DISULFIDE WHICH HAS A LOWER ALKYL, HALOGEN, PHENYL OR NITRO-SUBSTITUTED PHENYL GROUP AS A SUBSTITUENT ON THE SULFUR.
Inventors
- 👤 T Mukaiyama
- 👤 R Matsueda
- 👤 K Gotow
- 👤 M Ueki
- 👤 H Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:07
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/06; C07K1/08; C07K1/088; C07K1/02; C07K1/023; C07K1/082; C07K1/086; C07K5/00; C07K5/04; C07K5/06; C07K5/06008; C07K5/06017; C07K5/06034; C07K5/06043
Claims Analysis
Total Claims: 0
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |