Patent US3411990A successfully refreshed from Google Patents.
US3411990A
Expired / Lapsed
US
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Process for producing l-glutamic acid
Assignee: KH Neochem Co Ltd
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Filing: 1965-12-16
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Granted: 1968-11-19
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Expires: 1985-12-16
Abstract
No abstract record available.
Inventors
- 👤 Udagawa Kiyoshi
- 👤 Kohata Mamoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:42
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/859; Y10S435/861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |