US4135979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of xanthan gum to improve clarity
Assignee: Monsanto Co
•
Filing: 1976-08-24
•
Granted: 1979-01-23
•
Expires: 1996-08-24
Abstract
Abstract A xanthan gum fermentation beer containing at least about 1% gum is filtered at a temperature of at least about 112° C. The gum subsequently recovered from the filtrate has improved clarity.
Inventors
- 👤 Foss E. Corley
- 👤 Joe B. Richmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:24
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0033
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A method for clarifying a xanthan gum produced by a bacterium of the genus Xanthomonas comprising filtering, at a temperature of at least about 112° C. up to a temperature beyond which thermal degradation of the gum occurs, a fermentation beer containing at least about 1.5 weight % xanthan gum, and separating the xanthan gum from the filtrate.
Claim 2
Independent Claim
58 words
A method for clarifying a xanthan gum produced by a bacterium of the genus Xanthomonas comprising filtering, at a temperature of at least about 112° C. up to a temperature beyond which thermal degradation of the gum occurs, a fermentation beer containing at least about 1.5 weight % xanthan gum, and separating the xanthan gum from the filtrate.
Claim 3
Dependent Claim
22 words
A method according to claim 1 wherein the beer contains from about 1.5 weight % to about 4.0 weight % xanthan gum.
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein the filtration takes place at a temperature of from about 112° C. to about 160° C.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein the filtration takes place at a temperature of from about 127° C. to about 149° C.
Claim 6
Dependent Claim
23 words
A method according to claim 2 wherein the filtration takes place at a temperature of from about 112° C. to about 160° C.
Claim 7
Dependent Claim
23 words
A method according to claim 2 wherein the filtration takes place at a temperature of from about 127° C. to about 149° C.
Claim 8
Dependent Claim
13 words
A method according to claim 1 wherein the separation is effected by drying.
Claim 9
Dependent Claim
12 words
A method according to claim 7 wherein the drying is spray drying.
Claim 10
Dependent Claim
12 words
A method according to claim 7 wherein the drying is drum drying.
Claim 11
Dependent Claim
14 words
A method according to claim 1 wherein the separation is effected by alcohol precipitation.
Claim 12
Dependent Claim
11 words
A method according to claim 10 wherein the alcohol is isopropanol.
References Cited (Backward Citations)
US2775540A
Cited
US3355447A
Cited
US3591578A
Cited
US3964972A
Cited
US3773752A
Cited
US4010071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |