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US2948659A
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Synthesis of 2-keto-l-gulonic acid
Assignee: Pfizer Inc
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Filing: 1954-08-10
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Granted: 1960-08-09
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Expires: 1974-08-10
Abstract
No abstract record available.
Inventors
- 👤 Richard N Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:31
CPC Classifications
C; C12; C12P; C12P39/00; C12P7/00; C12P7/40; C12P7/58; C12P7/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING 2-KETO-1 GULONIC CID WHICH PROCESS COMPRISES SUBJECTING TO THE OXIDIZING SYSTEM PRODUCED BY CULTIVATING A MIXTURE OF ATCC 11867 AND ATCC 11868 UNDER AEROBIC CONDITIONS ON AN OTHERWISE STERILE NUTRIENT MEDIUM, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-IDONIC ACID AND A NON-TOXI 1IDONATE.
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING 2-KETO-1 GULONIC CID WHICH PROCESS COMPRISES SUBJECTING TO THE OXIDIZING SYSTEM PRODUCED BY CULTIVATING A MIXTURE OF ATCC 11867 AND ATCC 11868 UNDER AEROBIC CONDITIONS ON AN OTHERWISE STERILE NUTRIENT MEDIUM, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-IDONIC ACID AND A NON-TOXI 1IDONATE.
References Cited (Backward Citations)
US2421611A
Cited
US2421612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |