Patent US3135727A successfully refreshed from Google Patents.
US3135727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignite derivative and process for preparing the same
Assignee: Magnet Cove Barium Corp
•
Filing: 1961-10-31
•
Granted: 1964-06-02
•
Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth P Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:32
CPC Classifications
C; C07; C07C; C07C309/00; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
THE PROCESS OF PREPARING A SULFO-ALKYLATED LIGNITE WHICH COMPRISES REACTING LIGNITE IN AN ALKALINE REACTION MEDIUM WITH FROM 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND ITS WATER-SOLUBLE SALTS, AND A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES IN AN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE IN THE RANGE OF 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF SAID LIGNITE, THE REACTION BEING CONDUCTED AT AN ELEVATED TEMPERATURE UNDER 375*F.
Claim 2
Dependent Claim
88 words
THE PROCESS OF PREPARING A SULFO-ALKYLATED LIGNITE WHICH COMPRISES REACTING LIGNITE IN AN ALKALINE REACTION MEDIUM WITH FROM 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND ITS WATER-SOLUBLE SALTS, AND A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES IN AN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE IN THE RANGE OF 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF SAID LIGNITE, THE REACTION BEING CONDUCTED AT AN ELEVATED TEMPERATURE UNDER 375*F.
Claim 3
Dependent Claim
146 words
A WATER SOLUBLE LIGNITE DERIVATIVE MADE BY HEATING 100 PARTS OF LIGNITE IN AN ALKALINE LIQUID REACTION MEDIUM WITH 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND ITS WATER SOLUBLE SALTS, AND A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES, SAID METHYLNIC COMPOUND BEING PRESENT IN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE WITHIN THE RANGE FROM 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF LIGNITE, AT A TEMPERATURE IN THE RANGE FROM 175* TO 375*F. FOR A TIME SUFFICIENT FOR A SUBSTANTIAL PROPORTION OF THE METHYLENIC AND THE SULFUR COMPOUNDS TO REACT AND FORM SIDE CHAINS ON THE LIGNITE HAVING THE FORMULA -R-SO3M, WHEREIN -R- IS SELECTED FROM THE GROUP CONSISTING OF METHYENE AND SUBSTITUTED METHYLENE RADICALS AND M IS AN ALKALI METAL; AND DRYING THE RESULTING PRODUCT.
Claim 4
Dependent Claim
146 words
A WATER SOLUBLE LIGNITE DERIVATIVE MADE BY HEATING 100 PARTS OF LIGNITE IN AN ALKALINE LIQUID REACTION MEDIUM WITH 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND ITS WATER SOLUBLE SALTS, AND A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES, SAID METHYLNIC COMPOUND BEING PRESENT IN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE WITHIN THE RANGE FROM 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF LIGNITE, AT A TEMPERATURE IN THE RANGE FROM 175* TO 375*F. FOR A TIME SUFFICIENT FOR A SUBSTANTIAL PROPORTION OF THE METHYLENIC AND THE SULFUR COMPOUNDS TO REACT AND FORM SIDE CHAINS ON THE LIGNITE HAVING THE FORMULA -R-SO3M, WHEREIN -R- IS SELECTED FROM THE GROUP CONSISTING OF METHYENE AND SUBSTITUTED METHYLENE RADICALS AND M IS AN ALKALI METAL; AND DRYING THE RESULTING PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |