Patent US5334698A successfully refreshed from Google Patents.
US5334698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polyesters by fermentation: a process for producing optically active carboxylic acids and esters: articles of manufacture comprising polyester
Assignee: University of Groningen
•
Filing: 1991-10-02
•
Granted: 1994-08-02
•
Expires: 2011-10-02
Abstract
Abstract This invention relates to a process for producing polyester biopolymers by culturing Pseudomonas oleovorans bacteria on substrates comprising certain nutrients. The nature of the polyesters can be varied by varying the nature of the carbon source used. In this way polyesters with unsaturated double bonds can be produced, too. From the polyesters, optically active carboxylic acids or esters are produced. The polymers can be used for making articles of manufacture, such as sutures, films, skin and bone grafts.
Inventors
- 👤 Bernard Witholt
- 👤 Roland G. Lageveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:04
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625; C08; C08G; C08G63/00; C08G63/02; C08G63/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/874
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
An optically active polyester compound isolated from Pseudomonas oleovorans cells cultured in a nutrient medium in the presence of a carbon source and at least one nutrient essential for growth, said carbon source comprising at least one paraffin product containing 6-7 or 9-12 carbon atoms or at least one paraffin oxidation product containing 6-12 carbon atoms, said polyester compound comprising units other than exclusively 3-hydroxyoctanoate units or 3-hydroxyoctanoate and 3-hydroxyhectanoate units having the structural formula: ##STR4## wherein m represents an integer of 2-8.
Claim 2
Dependent Claim
83 words
An optically active polyester compound isolated from Pseudomonas oleovorans cells cultured in a nutrient medium in the presence of a carbon source and at least one nutrient essential for growth, said carbon source comprising at least one paraffin product containing 6-7 or 9-12 carbon atoms or at least one paraffin oxidation product containing 6-12 carbon atoms, said polyester compound comprising units other than exclusively 3-hydroxyoctanoate units or 3-hydroxyoctanoate and 3-hydroxyhectanoate units having the structural formula: ##STR4## wherein m represents an integer of 2-8.
Claim 3
Dependent Claim
15 words
An article of manufacture made from an optically active polyester compound according to claim 1.
Claim 4
Dependent Claim
21 words
The article according to claim 2 wherein said article is a suture, a film, a skin graft or a bone graft,
Claim 5
Dependent Claim
87 words
An optically active polyester compound isolated from Pseudomonas oleovorans cells cultured in a nutrient medium in the presence of a carbon source and at least one nutrient essential for growth, said carbon source comprising at least one compound selected from unbranched 1-olefins containing 7-12 carbon atoms and optionally one or more non-branched paraffins or paraffin oxidation products containing 6-12 carbon atoms, said polyester compound comprising units having the structural formula (1): ##STR5## and units having the structural formula (2): ##STR6## wherein m represents an integer of 2-8.
Claim 6
Dependent Claim
87 words
An optically active polyester compound isolated from Pseudomonas oleovorans cells cultured in a nutrient medium in the presence of a carbon source and at least one nutrient essential for growth, said carbon source comprising at least one compound selected from unbranched 1-olefins containing 7-12 carbon atoms and optionally one or more non-branched paraffins or paraffin oxidation products containing 6-12 carbon atoms, said polyester compound comprising units having the structural formula (1): ##STR5## and units having the structural formula (2): ##STR6## wherein m represents an integer of 2-8.
Claim 7
Dependent Claim
15 words
An article of manufacture made from an optically active polyester compound according to claim 4.
Claim 8
Dependent Claim
21 words
The article according to claim 5 wherein said article is a suture, a film, a skin graft or a bone graft.
References Cited (Backward Citations)
US4477654A
Cited
US5023316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |