Patent US3790647A successfully refreshed from Google Patents.
Patent US3875140A successfully refreshed from Google Patents.
US3875140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of fructose
Assignee: Roche Diagnostics GmbH
•
Filing: 1973-05-30
•
Granted: 1975-04-01
•
Expires: 1993-05-30
Abstract
Abstract Fructose is produced by the isomerization of glucose and/or mannose by a process comprising isomerizing the glucose or mannose in an alkali solution containing an aryl boric acid.
Inventors
- 👤 Sidney Alan Barker
- 👤 Peter John Somers
- 👤 Brian William Hatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:21
CPC Classifications
C; C13; C13K; C13K11/00; H; H02; H02J; H02J13/00; H02J13/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
PROCESS FOR THE PRODUCTION OF FRUCTOSE BY THE ISOMERIZATION OF A SUGAR SELECTED FROM THE GROUP CONSISTING OF GLUCOSE, MANNOSE AND MIXTURES THEREOF COMPRISING ISOMERIZING SAID SUGAR IN AN ALKALI SOLUTION CONTAINING AN ARYL BORIC ACID.
Claim 2
Dependent Claim
36 words
PROCESS FOR THE PRODUCTION OF FRUCTOSE BY THE ISOMERIZATION OF A SUGAR SELECTED FROM THE GROUP CONSISTING OF GLUCOSE, MANNOSE AND MIXTURES THEREOF COMPRISING ISOMERIZING SAID SUGAR IN AN ALKALI SOLUTION CONTAINING AN ARYL BORIC ACID.
Claim 3
Dependent Claim
18 words
Process as claimed in claim 1, wherein the solution has a pH value of between 10 and 14.
Claim 4
Dependent Claim
18 words
Process as claimed in claim 2, wherein the solution has a pH value of between 11 and 12.5.
Claim 5
Dependent Claim
23 words
Process as claimed in claim 1, wherein the process is carried out in aqueous solution at a temperature of between 20* and 80*C.
Claim 6
Dependent Claim
20 words
Process as claimed in claim 4, wherein the process is carried out at a temperature of between 45* and 50*C.
Claim 7
Dependent Claim
19 words
Process as claimed in claim 1, wherein the aryl boric acid is a component of an insoluble organic polymer.
Claim 8
Dependent Claim
23 words
Process as claimed in claim 6, wherein the polymer is a polymer or copolymer of vinylphenyl boric acid or of a derivative thereof.
Claim 9
Dependent Claim
21 words
Process as claimed in claim 6, wherein the polymer is an ion exchanger resin loaded with a phenyl boric acid derivative.
References Cited (Backward Citations)
US2746889A
Cited
US2818851A
Cited
US3432345A
Cited
US3431253A
Cited
US3514327A
Cited
US3558355A
Cited
US3684574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |