US3645848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing glucose isomerase
Assignee: RJ Reynolds Tobacco Co
•
Filing: 1969-11-17
•
Granted: 1972-02-29
•
Expires: 1989-11-17
Abstract
Abstract Glucose is converted to fructose in the presence of an enzyme preparation derived from a member of the genus Arthrobacter.
Inventors
- 👤 Chin K Lee
- 👤 Lawrence E Hayes
- 👤 Margaret E Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/90; C12N9/92; C12P; C12P19/00; C12P19/24; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/83
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
12 words
A process according to claim 1 in which said carbohydrate is xylose.
Claim 2
Dependent Claim
12 words
A process according to claim 1 in which said carbohydrate is xylan.
Claim 3
Dependent Claim
12 words
A process according to claim 1 in which said carbohydrate is glucose.
Claim 4
Dependent Claim
28 words
A process according to claim 2 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3724 or NRRL B-3725 or NRRL B-3726 or NRRL B-3727 or NRRL B-3728.
Claim 5
Dependent Claim
28 words
A process according to claim 3 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3724 or NRRL B-3725 or NRRL B-3726 or NRRL B-3727 or NRRL B-3728.
Claim 6
Dependent Claim
22 words
A process according to claim 4 in which the micro-organism in Arthrobacter nov. sp. NRRL B-3726 or NRRL B-3727 or NRRL B-3728.
Claim 7
Dependent Claim
31 words
A process for converting glucose to fructose which comprises incubating a glucose-containing liquor with a glucose-isomerizing enzyme derived from a micro-organism belonging to the genus Arthrobacter and recovering a fructose-containing liquor.
Claim 8
Dependent Claim
23 words
A process according to claim 8 in which said enzyme is derived from an Arthrobacter micro-organism grown in a nutrient medium containing xylose.
Claim 9
Dependent Claim
23 words
A process according to claim 8 in which said enzyme is derived from an Arthrobacter micro-organism grown in a nutrient medium containing xylan.
Claim 10
Dependent Claim
23 words
A process according to claim 8 in which said enzyme is derived from an Arthrobacter micro-organism grown in a nutrient medium containing glucose.
Claim 11
Dependent Claim
51 words
A process according to claim 8 in which the incubation is carried out at a temperature of about 50* C. to about 90* C. in a pH range of approximately 6.0 to 10.0 and said enzyme is derived from an Arthrobacter micro-organism grown in a nutrient medium containing xylose or xylan.
Claim 12
Dependent Claim
55 words
A process according to claim 8 in which the incubation is carried out at a temperature of about 50* C. to about 90* C. in a pH range of approximately 6.0 to 10.0 and said enzyme Is derived from an Arthrobacter micro-organism grown in a glucose-containing nutrient medium in the absence of xylose or xylan.
Claim 13
Dependent Claim
28 words
A process according to claim 12 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3724 or NRRL B-3725 or NRRL B-3726 or NRRL B-3727 or NRRL B-3728.
Claim 14
Dependent Claim
16 words
A process according to claim 13 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3726.
Claim 15
Dependent Claim
16 words
A process according to claim 13 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3727.
Claim 16
Dependent Claim
16 words
A process according to claim 13 in which the micro-organism is Arthrobacter nov. sp. NRRL B-3728.
References Cited (Backward Citations)
US3345269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |