US4310684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating poly-β-hydroxybutyrates from a biomass
Assignee: Solvay SA
•
Filing: 1980-01-04
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Granted: 1982-01-12
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Expires: 2000-01-04
Abstract
Abstract A process for separating poly-β-hydroxybutyrates from a biomass by extraction using at least one liquid halogenated solvent selected from the group consisting of chloroethanes and chloropropanes.
Inventors
- 👤 Noel Vanlautem
- 👤 Jacques Gilain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:06
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
Process for separating poly-β-hydroxybutyrates from a biomass by extraction using liquid halogenated solvents, comprising performing the extraction with at least one liquid halogenated solvet selected from the group consisting of 1,2-dichloroethane, 1,1,2-trichloroethane, and 1,1,2,2-tetrachloroethane.
Claim 2
Dependent Claim
34 words
Process for separating poly-β-hydroxybutyrates from a biomass by extraction using liquid halogenated solvents, comprising performing the extraction with at least one liquid halogenated solvet selected from the group consisting of 1,2-dichloroethane, 1,1,2-trichloroethane, and 1,1,2,2-tetrachloroethane.
Claim 3
Dependent Claim
19 words
Process according to claim 1, wherein the extraction is carried out at a temperature between 60° and 90° C.
Claim 4
Dependent Claim
14 words
Process according to claim 1 comprising initially separating said biomass from the culture medium.
Claim 5
Dependent Claim
18 words
Process according to claim 2, wherein the ratio of biomass to extraction solvent is between 1:1 and 1:100.
Claim 6
Dependent Claim
18 words
Process according to claim 2, wherein the ratio of biomass to extraction solvent is between 1:5 and 1:10.
Claim 7
Dependent Claim
19 words
Process according to claim 2 comprising performing the extraction at a pressure between 0.1 and 10 kg/cm 2 .
References Cited (Backward Citations)
US3036959A
Cited
US3044942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |