US2861922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fumaric acid fermentation process
Assignee: Millennium Petrochemicals Inc
•
Filing: 1955-12-21
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Granted: 1958-11-25
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Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 Hyman R Lubowitz
- 👤 Roe Earl G La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:29
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/46; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A PROCESS FOR PRODUCTION OF FUMARIC ACID BY FERMENTATION OF A CARBOHYDRATE-CONTAINING SUBSTANCE BY MEANS OF FUMARIC ACID-PRODUCING FUNGI OF THE GENUS RHIZOPUS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID FERMENTATION IN THE PRESENCE OF A SOURCE OF NICKEL IONS IN AN AMOUNT OF FROM ABOUT 10 TO ABOUT 300 PARTS OF NICKEL IONS PER MILLION PARTS OF THE FERMENTATION MEDIUM.
Claim 2
Dependent Claim
62 words
IN A PROCESS FOR PRODUCTION OF FUMARIC ACID BY FERMENTATION OF A CARBOHYDRATE-CONTAINING SUBSTANCE BY MEANS OF FUMARIC ACID-PRODUCING FUNGI OF THE GENUS RHIZOPUS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID FERMENTATION IN THE PRESENCE OF A SOURCE OF NICKEL IONS IN AN AMOUNT OF FROM ABOUT 10 TO ABOUT 300 PARTS OF NICKEL IONS PER MILLION PARTS OF THE FERMENTATION MEDIUM.
References Cited (Backward Citations)
US2326986A
Cited
US2327191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |