US3867554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yeast glycan and process of making same
Assignee: Individual
•
Filing: 1972-11-29
•
Granted: 1975-02-18
•
Expires: 1992-11-29
Abstract
Abstract This application covers a yeast product which is derived from ruptured yeast cell walls and is known as yeast gum or yeast glycan. The yeast glycan is separated from the soluble parts of the yeast, purified, and dried. The yeast glycan increases the viscosity of aqueous fluids when rehydrated. The suspensions of yeast glycan also have a bland flavor, a ''''fat-like'''' mouth feel, and a sheen in appearance. Yeast glycan can be substituted for fat in certain dietary type food products, such as salad dressing, ice cream, etc.
Inventors
- 👤 Robert William Sucher
- 👤 Ernest Aleck Robbins
- 👤 Daniel Robert Sidoti
- 👤 Jr Erich Henry Schuldt
- 👤 Robert Dudley Seeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:19
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/005
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
A yeast product comprising yeast fragments and whole cells containing on a dry solids basis from about 5 to about 20% crude protein, from about 0.1 to about 3 percent nucleic acid, from about 0.1 to about 3 percent lipid, from about 0.5 to about 3 percent ash, and from about 60 to about 95 percent carbohydrate, and having a minimum viscosity of 500 centipoise when suspended in a 10 percent aqueous suspension, said product having a majority of irregular cell wall fragments and having a minor amount of whole cells.
Claim 2
Dependent Claim
91 words
A yeast product comprising yeast fragments and whole cells containing on a dry solids basis from about 5 to about 20% crude protein, from about 0.1 to about 3 percent nucleic acid, from about 0.1 to about 3 percent lipid, from about 0.5 to about 3 percent ash, and from about 60 to about 95 percent carbohydrate, and having a minimum viscosity of 500 centipoise when suspended in a 10 percent aqueous suspension, said product having a majority of irregular cell wall fragments and having a minor amount of whole cells.
Claim 3
Dependent Claim
16 words
A product according to claim 1 having greater than 3,500 centipoise in said 10 percent suspension.
Claim 4
Dependent Claim
17 words
A product according to claim 1 derived from Saccharomyces cerevisiae, Saccharomyces carlsbergensis, Saccharomyces fragilis, and Candida utilis.
Claim 5
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF YEAST GLYCAN COMPRISING A. GROWING A FOOD GRADE YEAST. B. HARVESTING AND WASHING THE YEAST BIOMASS, C. RUPTURING THE UEAST CELLS, D. EXTRACTING THE RAPTURED YEAST CELLS AT A PH OF 5.5 TO 11 FOR UP TO ABOUT 60 MINUTES, E. SEPARATING THE INSOLUBLE GLYCAN FROM SOLUBLE CYTOPLASMIC MATERIALS, AND F. RECOVERING A YEAST GYLCAN PRODUCT HAVING A MAJOR AMOUNT OF IRREGULAR CELL WALL FRAGMENTS AND A MINOR AMOUNT OF WHOLE CELLS.
Claim 6
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF YEAST GLYCAN COMPRISING A. GROWING A FOOD GRADE YEAST. B. HARVESTING AND WASHING THE YEAST BIOMASS, C. RUPTURING THE UEAST CELLS, D. EXTRACTING THE RAPTURED YEAST CELLS AT A PH OF 5.5 TO 11 FOR UP TO ABOUT 60 MINUTES, E. SEPARATING THE INSOLUBLE GLYCAN FROM SOLUBLE CYTOPLASMIC MATERIALS, AND F. RECOVERING A YEAST GYLCAN PRODUCT HAVING A MAJOR AMOUNT OF IRREGULAR CELL WALL FRAGMENTS AND A MINOR AMOUNT OF WHOLE CELLS.
Claim 7
Dependent Claim
63 words
The process of claim 4 including the step of A. Washing the recovered glycan with water, B. Concentrating the glycan, and C. Drying the glycan to recover a product containing on a dry solids basis from 5 to 20% crude protein, from 0.1 to 3% nucleic acid, from 0.1 to 3% lipid, from 0.5 to 3% ash, and from 60 to 95% carbohydrate.
Claim 8
Dependent Claim
22 words
A process according to claim 5 wherein the viscosity of the glycan is increased by incubating at pH 9.5 prior to drying.
Claim 9
Dependent Claim
12 words
A process according to claim 5 wherein the glycan is spray dried.
Claim 10
Dependent Claim
26 words
A process according to claim 4 in which the yeast is selected from the group consisting of Saccharomyces cerevisiae, Saccharomyces carlsbergensis, Saccharomyces fragilis, and Candida utilis.
Claim 11
Dependent Claim
17 words
A process according to claim 4 wherein the yeast cells are ruptured by homogenization below about 50*C.
Claim 12
Dependent Claim
38 words
A process according to claim 4 wherein the ruptured yeast cells are extracted as a pH between about 6 and about 11 and a temperature between about 25* and about 60*C. for about 5 to abaout 60 minutes.
Claim 13
Dependent Claim
31 words
A process according to claim 4 wherein the ruptured yeast cells are extracted at a pH of about 9.5 and a temperature between 25*C. and 60*C. for 5 to 60 minutes.
Claim 14
Dependent Claim
14 words
The process according to claim 4 wherein the insoluble glycan is separated by centrifugation.
Claim 15
Dependent Claim
23 words
A process according to claim 5 wherein the protein content of the glycan is reduced to a constant amount by repeated aqueous washings.
Claim 16
Dependent Claim
26 words
A process according to claim 4 wherein the protein content of the glycan is reduced by homogenization and aqueous washing prior to recovery of the glycan.
Claim 17
Dependent Claim
65 words
A process according to claim 4 including the steps of: A. Homogenizing the separated glycan, B. Washing the homogenized glycan with water, and C. Drying the glycan to recover a product containing on a dry solids basis from 5 to 20% crude protein, from 0.1 to 3% nucleic acid, from 0.1 to 3% lipid, from 0.5 to 3% ash, and from 60 to 95% carbohydrate.
Claim 18
Dependent Claim
43 words
The process of claim 4 including the step of rehydrating the separated insoluble glycan and holding the same for about 3 to about 30 hours at a pH of about 8.5 to about 10 and a temperature of about 40*F. to about 122*F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |