US3000790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an atypically salt-responsive alkali-deacetylated polysaccharide
Assignee: Individual
•
Filing: 1959-12-30
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Granted: 1961-09-19
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Allene R Jeanes
- 👤 James H Sloneker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:23
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/91; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF PREPARING THE SUBSTANTIALLY DEACETYLATED DERIVATIVE OF THE POLYMERIC POLYSACCHARIDE B-1459 COMPRISING THE STEPS OF, UNDER NITROGEN, DISSOLVING 0.67 PARTS OF NATIVE POLYSACCHARIDE B-1459 IN 100 PARTS OF AIR-FREE WATER CONTAINING 1.35 PARTS OF POTASSIUM CHLORIDE, VIGOROUSLY STIRRING IN 34 PARTS OF 0.20 N POTASSIUM HYDROXIDE SOLUTION, MAINTAINING THE MIXTURE AT 25*C. FOR 2 HOURS UNDER NITROGEN, ADJUSTING THE PH TO NEUTRALITY, AND PRECIPITATING THE DEACETYLATED POLYSACCHARIDE BY ADDING METHANOL TO PROVIDE A CONCENTRATION THEREOF OF 44 PERCENT BY WEIGHT, SAID NATIVE POLYSACCHARIDE B-1459 HAVING BEEN PRECIPITATED BY THE ADDITION OF METHANOL AND POTASSIUM CHLORIDE TO PROVIDE RESPECTIVE CONCENTRATIONS OF 56 PERCENT AND 2 PERCENT THEREOF IN A CENTRIFUGED 72-96 HOUR AEROBIC WHOLE CULTURE FERMENTATION OF XANTHOMONAS CAMPESTRIS NRRL B-1459.
Claim 2
Independent Claim
122 words
A METHOD OF PREPARING THE SUBSTANTIALLY DEACETYLATED DERIVATIVE OF THE POLYMERIC POLYSACCHARIDE B-1459 COMPRISING THE STEPS OF, UNDER NITROGEN, DISSOLVING 0.67 PARTS OF NATIVE POLYSACCHARIDE B-1459 IN 100 PARTS OF AIR-FREE WATER CONTAINING 1.35 PARTS OF POTASSIUM CHLORIDE, VIGOROUSLY STIRRING IN 34 PARTS OF 0.20 N POTASSIUM HYDROXIDE SOLUTION, MAINTAINING THE MIXTURE AT 25*C. FOR 2 HOURS UNDER NITROGEN, ADJUSTING THE PH TO NEUTRALITY, AND PRECIPITATING THE DEACETYLATED POLYSACCHARIDE BY ADDING METHANOL TO PROVIDE A CONCENTRATION THEREOF OF 44 PERCENT BY WEIGHT, SAID NATIVE POLYSACCHARIDE B-1459 HAVING BEEN PRECIPITATED BY THE ADDITION OF METHANOL AND POTASSIUM CHLORIDE TO PROVIDE RESPECTIVE CONCENTRATIONS OF 56 PERCENT AND 2 PERCENT THEREOF IN A CENTRIFUGED 72-96 HOUR AEROBIC WHOLE CULTURE FERMENTATION OF XANTHOMONAS CAMPESTRIS NRRL B-1459.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |