US3352902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfomethylation of humic acids, lignites, and coals and products thereof
Assignee: Canadian Patents and Development Ltd
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Filing: 1964-01-13
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Granted: 1967-11-14
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Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 Spiros E Moschopedis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:13
CPC Classifications
C; C08; C08H; C08H99/00; C05; C05F; C05F11/00; C05F11/02; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A PROCESS FOR SOLUBILIZING HUMIC ACIDS, LIGNITES AND PRE-OXIDIZED SUB-BITUMINOUS COALS COMPRISING REACTING SAID MATERIALS IN ALKALI SOLUTION WITH ALKALI HYDROXYMETHANE SULFONATE AT ELEVATED TEMPERATURES OF THE ORDER OF 100* C. UNTIL SULFOMETHYLATIN IS SUBSTANTIALLY COMPLETE, SEPARATING THE INSOLUBLE MATTER, PRECIPITATING THE SOLUBLE SULFOMETHYLATED PRODUCT WITH CONCENTRATED ACID, WASHING THE PRECIPITATE WITH MINERAL ACID SOLUTION OF CONCENTRATION AT LEAST ABOUT 10% TO REMOVE MINERAL MATTER, AND RECOVERING THE WATER-SOLUBLE PRODUCT.
Claim 2
Dependent Claim
70 words
A PROCESS FOR SOLUBILIZING HUMIC ACIDS, LIGNITES AND PRE-OXIDIZED SUB-BITUMINOUS COALS COMPRISING REACTING SAID MATERIALS IN ALKALI SOLUTION WITH ALKALI HYDROXYMETHANE SULFONATE AT ELEVATED TEMPERATURES OF THE ORDER OF 100* C. UNTIL SULFOMETHYLATIN IS SUBSTANTIALLY COMPLETE, SEPARATING THE INSOLUBLE MATTER, PRECIPITATING THE SOLUBLE SULFOMETHYLATED PRODUCT WITH CONCENTRATED ACID, WASHING THE PRECIPITATE WITH MINERAL ACID SOLUTION OF CONCENTRATION AT LEAST ABOUT 10% TO REMOVE MINERAL MATTER, AND RECOVERING THE WATER-SOLUBLE PRODUCT.
Claim 3
Dependent Claim
70 words
A WATER-SOLUBLE DEMINERALIZED DERIVATIVE OF HUMIC ACIDS, LIGNITES AND PRE-OXIDIZED SUB-BITUMINOUS COALS, CONTAINING-CH2.SO3.M RADICALS WHERE M IS A CATION FROM THE GROUP HYDROGEN, ALKALI METAL AND AMMONIUM, AND HALOGEN RADICALS FROM THE GROUPS CHLORINE AND BROMINE IN AMOUNTS OF ABOUT 20 TO 25% BY WT. AND PRODUCED BY REACTION IN ALKALI SOLUTION WITH ALKALI HYDROXYMETHANE SOLFONATE AT TEMPERATURES OF THE ORDER OF 100*C. WITHOUT DEGRADATION BEYOND THE HUMIC ACID STAGE.
Claim 4
Dependent Claim
70 words
A WATER-SOLUBLE DEMINERALIZED DERIVATIVE OF HUMIC ACIDS, LIGNITES AND PRE-OXIDIZED SUB-BITUMINOUS COALS, CONTAINING-CH2.SO3.M RADICALS WHERE M IS A CATION FROM THE GROUP HYDROGEN, ALKALI METAL AND AMMONIUM, AND HALOGEN RADICALS FROM THE GROUPS CHLORINE AND BROMINE IN AMOUNTS OF ABOUT 20 TO 25% BY WT. AND PRODUCED BY REACTION IN ALKALI SOLUTION WITH ALKALI HYDROXYMETHANE SOLFONATE AT TEMPERATURES OF THE ORDER OF 100*C. WITHOUT DEGRADATION BEYOND THE HUMIC ACID STAGE.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |