US3142702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isolating free alpha-amino acids from cupric complex salts thereof
Assignee: Teijin Ltd
•
Filing: 1962-05-28
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Granted: 1964-07-28
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Sawa Natsuo
- 👤 Tsujino Yoichi
- 👤 Kishizoe Shigeru
- 👤 Yoshida Tetsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:42
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PROCESS FOR THE ISOLATION OF FREE A-AMINO ACID FROM CURPRIC COMPLEX SALTS THEREOF REPRESENTED BY A FOLLOWING FORMULA:
Claim 2
Dependent Claim
19 words
A PROCESS FOR THE ISOLATION OF FREE A-AMINO ACID FROM CURPRIC COMPLEX SALTS THEREOF REPRESENTED BY A FOLLOWING FORMULA:
References Cited (Backward Citations)
US3068281A
Cited
US3059026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |