US2648629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic preparation of periodate oxypolysaccharides
Assignee: United States Department of Agriculture
•
Filing: 1951-03-06
•
Granted: 1953-08-11
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Dvonch William
- 👤 Charles L Mehltretter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:20
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
METHOD FOR THE PREPARATION OF OXYPOLYSACCHARIDES COMPRISING SUBJECTING A POLYSACCHARIDE MATERIAL TO THE EFFECT OF SUBSTANTIALLY CATALYTIC AMOUNTS OF PERIODIC ACID IN THE PRESENCE OF A CATHODE AND A LEAD DIOXIDE ANODE AT A TEMPERATURE OF ABOUT FROM 5* C. TO 50* C., PASSING ELECTRIC CURRENT THROUGH THE SYSTEM, SAID PERIODIC ACID BEING CONTINUOUSLY TRANSFORMED TO IODIC ACID BY CHEMICAL REACTION WITH THE POLYSACCHARIDE MATERIAL AND SAID IODIC ACID BEING CONTINUOUSLY REGENERATED TO PERIODIC ACID AT THE ANODE, AND CONTINUING SAID ELECTRIC CURRENT UNTIL SUBSTANTIAL AMOUNTS OF THE POLYSACCHARIDE ARE OXIDIZED.
Claim 2
Dependent Claim
91 words
METHOD FOR THE PREPARATION OF OXYPOLYSACCHARIDES COMPRISING SUBJECTING A POLYSACCHARIDE MATERIAL TO THE EFFECT OF SUBSTANTIALLY CATALYTIC AMOUNTS OF PERIODIC ACID IN THE PRESENCE OF A CATHODE AND A LEAD DIOXIDE ANODE AT A TEMPERATURE OF ABOUT FROM 5* C. TO 50* C., PASSING ELECTRIC CURRENT THROUGH THE SYSTEM, SAID PERIODIC ACID BEING CONTINUOUSLY TRANSFORMED TO IODIC ACID BY CHEMICAL REACTION WITH THE POLYSACCHARIDE MATERIAL AND SAID IODIC ACID BEING CONTINUOUSLY REGENERATED TO PERIODIC ACID AT THE ANODE, AND CONTINUING SAID ELECTRIC CURRENT UNTIL SUBSTANTIAL AMOUNTS OF THE POLYSACCHARIDE ARE OXIDIZED.
References Cited (Backward Citations)
DE388791C
Cited
US2559034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |