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Patent US3431295A successfully refreshed from Google Patents.
US3431295A
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US
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Process for the preparation of optically active lysine
Assignee: Stamicarbon BV
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Filing: 1964-11-12
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Granted: 1969-03-04
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Geertrudes H Suverkropp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:49
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487; C07B; C07B57/00; C07B2200/00; C07B2200/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2556907A
Cited
GB899023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |