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US3091618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing metal-containing phthalocyanine sulfonic acids
Assignee: Honeywell International Inc
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Filing: 1960-12-27
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Granted: 1963-05-28
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Fleysher
- 👤 Walter B Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:58
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN THE PROCESS OF PREPARING METAL-CONTAINING PHTHALOCYANINE SULFONIC ACIDS WHICH COMPRISES THE STEPS OF CONTACTING THE METAL-CONTAINING PHTHALOCYAMINE IN WHICH THE METAL IS FROM THE GROUP CONSISTING OF COPPER, COBALT, NICKEL, IRON, VANDIUM, ZINC AND ALUMINUM WITH A SUBSTANTIALLY ANHYDROUS SULFONATING AGENT FROM THE GROUP CONSISTING OF SULFURIC ACID, FUMING SULFURIC ACID, CHLOROSULFONIC ACID AND MIXTURES OF SAID ACIDS AT A TEMPERATURE WITHIN THE RANGE OF 0*C. TO 200*C., THE IMPROVEMENT WHICH CONSISTS IN MAINTAINING THE SULFONATION MASS IN AN INERT ATMOSPHERE DURING THE SULFONATION.
Claim 2
Dependent Claim
85 words
IN THE PROCESS OF PREPARING METAL-CONTAINING PHTHALOCYANINE SULFONIC ACIDS WHICH COMPRISES THE STEPS OF CONTACTING THE METAL-CONTAINING PHTHALOCYAMINE IN WHICH THE METAL IS FROM THE GROUP CONSISTING OF COPPER, COBALT, NICKEL, IRON, VANDIUM, ZINC AND ALUMINUM WITH A SUBSTANTIALLY ANHYDROUS SULFONATING AGENT FROM THE GROUP CONSISTING OF SULFURIC ACID, FUMING SULFURIC ACID, CHLOROSULFONIC ACID AND MIXTURES OF SAID ACIDS AT A TEMPERATURE WITHIN THE RANGE OF 0*C. TO 200*C., THE IMPROVEMENT WHICH CONSISTS IN MAINTAINING THE SULFONATION MASS IN AN INERT ATMOSPHERE DURING THE SULFONATION.
References Cited (Backward Citations)
US2613128A
Cited
US2917518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |