Patent US3494831A successfully refreshed from Google Patents.
US3494831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing l-lysine from 5-(4-aminobutyl)-hydantoin
Assignee: KH Neochem Co Ltd
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Filing: 1968-08-06
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Granted: 1970-02-10
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Expires: 1988-08-06
Abstract
No abstract record available.
Inventors
- 👤 Kiyoshi Nakayama
- 👤 Hiroshi Hagino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:19
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/08; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/828; Y10S435/83; Y10S435/832; Y10S435/834; Y10S435/838; Y10S435/839; Y10S435/84; Y10S435/843; Y10S435/845; Y10S435/859; Y10S435/861; Y10S435/874; Y10S435/909; Y10S435/911; Y10S435/913; Y10S435/914; Y10S435/921
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) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |