US3316241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of polysaccharide gum polymers
Assignee: Commercial Solvents Corp
•
Filing: 1965-12-16
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Granted: 1967-04-25
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Expires: 1985-12-16
Abstract
No abstract record available.
Inventors
- 👤 Hans J Leder
- 👤 Guido M Miescher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE RECOVERY OF POLYSACCHARIDE B-1459 FROM ITS NORMALLY VISCOUS FERMENTATION MEDIUM WHICH COMPRISES DRYING SAID FERMENTATION MEDIUM TO FORM A SOLID MATERIAL WITH A SINGLE-PHASE, LIQUID MIXTURE CONSISTING ESSENTIALLY OF METHANOL, WATER AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACETONE AND 1,1,1TRICHLOROETHANE TO FORM A DISPERSION OF THE SAID POLYSACCARIDE B-1459 IN THE SAID LIQUID MIXTURE, AND SEPARATING THE SAID POLYSACCHARIDE B-1459 FROM THE SAID LIQUID MIXTURE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE RECOVERY OF POLYSACCHARIDE B-1459 FROM ITS NORMALLY VISCOUS FERMENTATION MEDIUM WHICH COMPRISES DRYING SAID FERMENTATION MEDIUM TO FORM A SOLID MATERIAL WITH A SINGLE-PHASE, LIQUID MIXTURE CONSISTING ESSENTIALLY OF METHANOL, WATER AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACETONE AND 1,1,1TRICHLOROETHANE TO FORM A DISPERSION OF THE SAID POLYSACCARIDE B-1459 IN THE SAID LIQUID MIXTURE, AND SEPARATING THE SAID POLYSACCHARIDE B-1459 FROM THE SAID LIQUID MIXTURE.
References Cited (Backward Citations)
US3232929A
Cited
US3256271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |