US3121669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing poly-beta-hydroxy-butyric acid
Assignee: WR Grace and Co
•
Filing: 1962-12-26
•
Granted: 1964-02-18
•
Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 James N Baptist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/837
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN THE PROCESS OF PREPARING POLY-B-HYDROXYBUTYRIC ACID BY THE GROWTH OF BACTERIA SELECTED FROM THE GROUP CONSISTING OF ATHIORHODACEAE, PSEUDOMONADACEAE, SPIRILLACEAE, RHIZOBIACEAE, BACILLACEAE AND AZOTOBACTERIACEAE IN A CULTURE MEDIUM WHEREBY THE BACTERIA ACQURE DEPOSITS OF SAID POLYESTER WITHIN THE CEIL WALLS FOLLOWED BY RECOVERY OF THE POLYESTER-CONTAINING BACTERIA, THE IMPROVEMENT WHICH COMPRISES ENTRAINING ACETIC ACID VAPOR IN A GAS STREAM, CONTINUOUSLY AERATING THE CULTURE MEDIUM WITH SAID GAS, AND, THROUGHOUT THE GROWTH PERIOD, MAINTAINING THE AMOUNT OF ACETIC ACID SUPPLIED TO THE MEDIUM BY ADJUSTING THE AMOUNT OF ACETIC ACID ENTRAINED IN SAID GAS STREAM TO MAINTAIN THE CULTURE MEDIUM PH AT 7-9.
Claim 2
Dependent Claim
103 words
IN THE PROCESS OF PREPARING POLY-B-HYDROXYBUTYRIC ACID BY THE GROWTH OF BACTERIA SELECTED FROM THE GROUP CONSISTING OF ATHIORHODACEAE, PSEUDOMONADACEAE, SPIRILLACEAE, RHIZOBIACEAE, BACILLACEAE AND AZOTOBACTERIACEAE IN A CULTURE MEDIUM WHEREBY THE BACTERIA ACQURE DEPOSITS OF SAID POLYESTER WITHIN THE CEIL WALLS FOLLOWED BY RECOVERY OF THE POLYESTER-CONTAINING BACTERIA, THE IMPROVEMENT WHICH COMPRISES ENTRAINING ACETIC ACID VAPOR IN A GAS STREAM, CONTINUOUSLY AERATING THE CULTURE MEDIUM WITH SAID GAS, AND, THROUGHOUT THE GROWTH PERIOD, MAINTAINING THE AMOUNT OF ACETIC ACID SUPPLIED TO THE MEDIUM BY ADJUSTING THE AMOUNT OF ACETIC ACID ENTRAINED IN SAID GAS STREAM TO MAINTAIN THE CULTURE MEDIUM PH AT 7-9.
References Cited (Backward Citations)
US2803586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |