Patent US2813810A successfully refreshed from Google Patents.
US2813810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of d-glucose and d-fructose
Assignee: University of Minnesota Twin Cities
•
Filing: 1954-06-01
•
Granted: 1957-11-19
•
Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Smith Fred
- 👤 David R Spriestersbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:17
CPC Classifications
C; C13; C13K; C13K3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF SEPARATING D-GLUCOSE FROM SUCROSE ANDD INVERT SUGAR WHICH COMPSRISES SUSPENDING A SUGAR SELECTEDD FROM THE GROUP CONSISTING OF SUCROSE AND INVERT SUGAR IN AN AQUEOUS KETONE SYSTEM IN THE PRESENCE OF A CATION EXCHANGE MATERIAL IN THE HYDROGEN CYCLE AND GENTLY AGITATING UNTIL CRYSTALLINE D-GLUCOSE SEPARATES OUT, SAIDD ION EXCHANGE MATERIAL BEING PRESENT IN AN AMOUNT FROM ABOUT 1/2 TO 1 1/2 TIMES THE WEIGHT OF THE SUGAR, SAID KETONE BEING PRESENT IN AN AMOUNT FROM ABOUT 5 TO 15 TIMES THE COMBINED WEIGHT OF THE SUGAR AND EXCHANGE MATERIAL AND SAID AQUEOUS KETONE SYSTEN CONTAINING FROM ABOUT 2 TO 8 PERCENT BY VOLUME OF WATER.
Claim 2
Independent Claim
109 words
A METHOD OF SEPARATING D-GLUCOSE FROM SUCROSE ANDD INVERT SUGAR WHICH COMPSRISES SUSPENDING A SUGAR SELECTEDD FROM THE GROUP CONSISTING OF SUCROSE AND INVERT SUGAR IN AN AQUEOUS KETONE SYSTEM IN THE PRESENCE OF A CATION EXCHANGE MATERIAL IN THE HYDROGEN CYCLE AND GENTLY AGITATING UNTIL CRYSTALLINE D-GLUCOSE SEPARATES OUT, SAIDD ION EXCHANGE MATERIAL BEING PRESENT IN AN AMOUNT FROM ABOUT 1/2 TO 1 1/2 TIMES THE WEIGHT OF THE SUGAR, SAID KETONE BEING PRESENT IN AN AMOUNT FROM ABOUT 5 TO 15 TIMES THE COMBINED WEIGHT OF THE SUGAR AND EXCHANGE MATERIAL AND SAID AQUEOUS KETONE SYSTEN CONTAINING FROM ABOUT 2 TO 8 PERCENT BY VOLUME OF WATER.
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |