US3192236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric chelates of hydroxy-substituted anthraquinones and the process for their preparation
Assignee: Monsanto Research Corp
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Filing: 1960-07-15
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Granted: 1965-06-29
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Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 John J O'connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:27
CPC Classifications
C; C08; C08G; C08G79/00; C09; C09B; C09B6/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
THE PROCESS WHICH COMPRISES (1) TREATING AN ANTHRAQUINONE DERIVATIVE OF THE GROUP CONSISTING OF ANTHRARUFIN, QUINIZARIN AND A B-HYDROXY DERIVATIVE THEREOF CONTAINING 1-2 HYDROXY GROUPS WITH A MEMBER OF THE GROUP CONSISTING OF AN ALKALI METAL ETHOXIDE, AND ALKALI METAL METHOXIDE AND AN ALKALI METAL HYDRIDE IN A SUBSTANTIALLY INERT HYDROXY-FREE ORGANIC SOLVENT TO FORM A DOUBLY IONIZED LIGAND OF SAID ANTHRAQUINONE DERIVATIVE, (2) ADDING TO THE RESULTING SOLUTION A SOLUBLE, SUBSTANTIALLY ANHYDROUS HYDROXY-FREE METAL SALT WHEREIN THE CATION IS A METAL HAVING A PRINCIPAL VALENCE OF 2 AND A COORDINATION NUMBER OF 4, AND (3) HEATING THE RESULTING MIXTURE TO GIVE A HIGH-MOLECULAR WEIGHT CHELATE CONDENSATION POLYMER.
Claim 2
Dependent Claim
108 words
THE PROCESS WHICH COMPRISES (1) TREATING AN ANTHRAQUINONE DERIVATIVE OF THE GROUP CONSISTING OF ANTHRARUFIN, QUINIZARIN AND A B-HYDROXY DERIVATIVE THEREOF CONTAINING 1-2 HYDROXY GROUPS WITH A MEMBER OF THE GROUP CONSISTING OF AN ALKALI METAL ETHOXIDE, AND ALKALI METAL METHOXIDE AND AN ALKALI METAL HYDRIDE IN A SUBSTANTIALLY INERT HYDROXY-FREE ORGANIC SOLVENT TO FORM A DOUBLY IONIZED LIGAND OF SAID ANTHRAQUINONE DERIVATIVE, (2) ADDING TO THE RESULTING SOLUTION A SOLUBLE, SUBSTANTIALLY ANHYDROUS HYDROXY-FREE METAL SALT WHEREIN THE CATION IS A METAL HAVING A PRINCIPAL VALENCE OF 2 AND A COORDINATION NUMBER OF 4, AND (3) HEATING THE RESULTING MIXTURE TO GIVE A HIGH-MOLECULAR WEIGHT CHELATE CONDENSATION POLYMER.
Claim 3
Dependent Claim
44 words
THE PROCESS WHICH COMPRISES TREATING 1,3,5,7-TETRAHYDROXYANTHRAQUINONE WITH ALKALI METAL METHOXIDE IN N,N-DIMETHYLFORMAMIDE TO FORM A DOUBLY IONIZED LIGAND OF SAID ANTHRAQUINONE COMPOUND, AND HEATING THE RESULTING REACTION MIXTURE WITH ZINC CHLORIDE TO GIVE A HIGH MOLECULAR WEIGHT CHELATE CONDENSATION POLYMER WHICH PRECIPITATES FROM WATER.
Claim 4
Dependent Claim
44 words
THE PROCESS WHICH COMPRISES TREATING 1,3,5,7-TETRAHYDROXYANTHRAQUINONE WITH ALKALI METAL METHOXIDE IN N,N-DIMETHYLFORMAMIDE TO FORM A DOUBLY IONIZED LIGAND OF SAID ANTHRAQUINONE COMPOUND, AND HEATING THE RESULTING REACTION MIXTURE WITH ZINC CHLORIDE TO GIVE A HIGH MOLECULAR WEIGHT CHELATE CONDENSATION POLYMER WHICH PRECIPITATES FROM WATER.
Claim 5
Dependent Claim
10 words
THE POLYMER PRODUCED BY THE PROCESS DEFINED IN CLAIM 2.
References Cited (Backward Citations)
US395866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |