US2606918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aldonic acids
Assignee: Individual
•
Filing: 1951-04-25
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Granted: 1952-08-12
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Expires: 1971-04-25
Abstract
No abstract record available.
Inventors
- 👤 Horace S Isbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:50
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07C; C07C59/00; C07C59/01; C07C59/10; C07C59/105; C07H; C07H3/00; C07H3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE PROCESS FOR PRODUCING ALDONIC ACIDS WHICH CONSISTS IN CONDENSING AN ALDOSE WITH AN ALKALI METAL CYANIDE IN THE PRESENCE OF AN ALKALI CARBONATE-BICARBONATE BUFFER, SAPONIFYING THE NITRILE, AND SEPARATING THE EPIMERIC ALDONIIC ACIDS IN KNOWN MANNER.
Claim 2
Dependent Claim
37 words
THE PROCESS FOR PRODUCING ALDONIC ACIDS WHICH CONSISTS IN CONDENSING AN ALDOSE WITH AN ALKALI METAL CYANIDE IN THE PRESENCE OF AN ALKALI CARBONATE-BICARBONATE BUFFER, SAPONIFYING THE NITRILE, AND SEPARATING THE EPIMERIC ALDONIIC ACIDS IN KNOWN MANNER.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |