Patent US3346326A successfully refreshed from Google Patents.
US3346326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled saponification of fibrous polyglutamic acid esters with aqueous-alcoholic solutions of a base
Assignee: Ajinomoto Co Inc
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Filing: 1963-03-19
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Granted: 1967-10-10
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Takeda Yoshifumi
- 👤 Okuda Toru
- 👤 Sakurai Setsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:01
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/02; D; D01; D01F; D01F6/00; D01F6/58; D01F6/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A METHOD OF PREPARING POLYPEPTIDE FIBERS THE MOLECULES OF WHICH HAVE RECURRING GROUPS
Claim 2
Independent Claim
13 words
A METHOD OF PREPARING POLYPEPTIDE FIBERS THE MOLECULES OF WHICH HAVE RECURRING GROUPS
References Cited (Backward Citations)
GB125153A
Cited
US2866783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |