US2650237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hexuronic acids and derivatives thereof
Assignee: Corn Products Refining Co
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Filing: 1949-12-17
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Granted: 1953-08-25
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Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Dean H Couch
- 👤 Elonza A Cleveland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/507; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C07; C07H; C07H7/00; C07H7/02; C07H7/033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF PREPARING DERIVATES OF URONIC ACIDS WHICH COMPRISES SUBJECTING A GLYCOSIDE TO OXIDATION WITH NITRIC ACID IN THE PRESENCE OF A CATALYST FROM THE GROUP CONSISTING OF NITROUS ACID, SALTS OF NITROUS ACID, AND NITROGEN TRIOXIDE GAS, AT A TEMPERATURE WITHIN THE RANGE OF 20* C. TO 100* C. FOR A SUFFICIENT TIME TO OXIDIZE A SUBSTANTIAL PROPORTION OF THE PRIMARY ALCOHOL GROUP OF SAID GLYCOSIDE; THE CONCENTRATION OF SAID NITRIC ACID BEING WITHIN THE RANGE OF 65 PERCENT TO 100 PRECENT; THE RATIO OF SAID NITRIC ACID TO SAID GLYCOSIDE BEING AT LEAST ONE MOLE OF SAID FOR EACH MOLE OF GLYCOSIDE.
Claim 2
Independent Claim
105 words
THE METHOD OF PREPARING DERIVATES OF URONIC ACIDS WHICH COMPRISES SUBJECTING A GLYCOSIDE TO OXIDATION WITH NITRIC ACID IN THE PRESENCE OF A CATALYST FROM THE GROUP CONSISTING OF NITROUS ACID, SALTS OF NITROUS ACID, AND NITROGEN TRIOXIDE GAS, AT A TEMPERATURE WITHIN THE RANGE OF 20* C. TO 100* C. FOR A SUFFICIENT TIME TO OXIDIZE A SUBSTANTIAL PROPORTION OF THE PRIMARY ALCOHOL GROUP OF SAID GLYCOSIDE; THE CONCENTRATION OF SAID NITRIC ACID BEING WITHIN THE RANGE OF 65 PERCENT TO 100 PRECENT; THE RATIO OF SAID NITRIC ACID TO SAID GLYCOSIDE BEING AT LEAST ONE MOLE OF SAID FOR EACH MOLE OF GLYCOSIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |