Patent US3228625A successfully refreshed from Google Patents.
US3256271A
Expired / Lapsed
US
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Method of improving viscosity characteristics of xanthomonas hydrophilic colloids and esters produced thereby
Assignee: Kelco Co
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Filing: 1963-06-26
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Granted: 1966-06-14
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schweiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0033; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE PROCESS OF TREATING XANTHOMONAS HYDROPHILIC COLLOID WHICH COMPRISES THE STEPS OF: TREATING SAID COLLOID WITH AN AQUEOUS SOLUTION OF A WATER SOLUBLE ACID SO AS TO PRODUCE THE FREE ACID OF SAID COLLOID; WASHING THE SO-TREATED COLLOID WITH A WATER MISCIBLE SOLVENT SO AS TO REMOVE SAID ACID; THEREAFTER TREATING THE WASHED COLLOID WITH A QUANTITY OF AN ALKALI SUFFICIENT TO NEUTRALIZE A PORTION OF THE CARBOXYL GROUPS; AND THEREAFTER TREATING THE THUS PARTIALLY NEUTRALIZED COLLOID WITH A LOWER ALKYLENE OXIDE UNTIL A MAJORITY OF THE AVAILABLE CARBOXYL GROUPS OF SAID COLLOID ARE ESTERIFIED.
Claim 2
Dependent Claim
95 words
THE PROCESS OF TREATING XANTHOMONAS HYDROPHILIC COLLOID WHICH COMPRISES THE STEPS OF: TREATING SAID COLLOID WITH AN AQUEOUS SOLUTION OF A WATER SOLUBLE ACID SO AS TO PRODUCE THE FREE ACID OF SAID COLLOID; WASHING THE SO-TREATED COLLOID WITH A WATER MISCIBLE SOLVENT SO AS TO REMOVE SAID ACID; THEREAFTER TREATING THE WASHED COLLOID WITH A QUANTITY OF AN ALKALI SUFFICIENT TO NEUTRALIZE A PORTION OF THE CARBOXYL GROUPS; AND THEREAFTER TREATING THE THUS PARTIALLY NEUTRALIZED COLLOID WITH A LOWER ALKYLENE OXIDE UNTIL A MAJORITY OF THE AVAILABLE CARBOXYL GROUPS OF SAID COLLOID ARE ESTERIFIED.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |