US3382229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysaccharide recovery process
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1963-04-11
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Granted: 1968-05-07
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 John T Patton
- 👤 Willis E Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:47
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRECIPITATING A HETEROPOLYSACCHARIDE PRODUCED BY THE ACTION OF BACTERIA OF THE GENIUS XANTHOMONAS ON A CARBOHYDRATE FROM AN AQUEOUS SOLUTION CONTAINING SAID HETERPOLYSACCHARIDE BACTERIA AND OTHER INSOLUBLE MATERIAL WHICH COMPRISES (A) ADDING A WATER-SOLUBLE SALT YIELDING POLYVALENT CATIONS TO SAID AQUEOUS SOLUTION, SAID SALT BEING ADDED IN CONCENTRATION SUFFICIENT TO PRECIPITATE THE HETEROPOLYSACCHARIDE ON RAISING THE PH OF SAID SOLUTION TO AN ALKALINE VALUE IN EXCESS OF ABOUT 8.5, (B) REMOVING SAID INSOLUBLE MATERIALS FROM SAID SOLUTION, (C) AND THEREAFTER ADDING AN ALKALINE AGENT TO SAID SOLUTION IN A CONCENTRATION SUFFICIENT TO RAISE THE PH TO SAID ALKALINE VALUE AND PRECIPITATE SAID HETEROPOLYSACCHARIDE.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRECIPITATING A HETEROPOLYSACCHARIDE PRODUCED BY THE ACTION OF BACTERIA OF THE GENIUS XANTHOMONAS ON A CARBOHYDRATE FROM AN AQUEOUS SOLUTION CONTAINING SAID HETERPOLYSACCHARIDE BACTERIA AND OTHER INSOLUBLE MATERIAL WHICH COMPRISES (A) ADDING A WATER-SOLUBLE SALT YIELDING POLYVALENT CATIONS TO SAID AQUEOUS SOLUTION, SAID SALT BEING ADDED IN CONCENTRATION SUFFICIENT TO PRECIPITATE THE HETEROPOLYSACCHARIDE ON RAISING THE PH OF SAID SOLUTION TO AN ALKALINE VALUE IN EXCESS OF ABOUT 8.5, (B) REMOVING SAID INSOLUBLE MATERIALS FROM SAID SOLUTION, (C) AND THEREAFTER ADDING AN ALKALINE AGENT TO SAID SOLUTION IN A CONCENTRATION SUFFICIENT TO RAISE THE PH TO SAID ALKALINE VALUE AND PRECIPITATE SAID HETEROPOLYSACCHARIDE.
References Cited (Backward Citations)
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US3020206A
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US3232929A
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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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |