Patent US3450599A successfully refreshed from Google Patents.
US3450599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing l-glutamic acid and alpha-ketoglutaric acid
Assignee: KH Neochem Co Ltd
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Filing: 1968-05-17
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Granted: 1969-06-17
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Expires: 1988-05-17
Abstract
No abstract record available.
Inventors
- 👤 Katsunobu Tanaka
- 👤 Kazuo Kimura
- 👤 Ken Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:45
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/50; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/83
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |