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Patent US3051718A successfully refreshed from Google Patents.
US3051718A
Expired / Lapsed
US
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Production of phthalocyanine colors in pigmentary state
Assignee: EIDP Inc
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Filing: 1960-01-25
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Granted: 1962-08-28
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Expires: 1980-01-25
Abstract
No abstract record available.
Inventors
- 👤 Norris G Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:40
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0019; C09B67/0025; C09B67/0026; C09B67/0032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PROCESS OF ACID-SWELLING A PREMILLED CHLORINEFREE PHTHALOCYANINE COLOR OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE AND METAL-FREE PHTHALOCYANINE, THE IMPROVEMENT WHICH CONSISTS OF SELECTING FOR SAID SWELLING TREATMENT AN ACID WHICH IS LIQUID AT THE TEMPERATURE OF THE TREATMENT AND WHICH HAS AN IONIZAATION CONSTANT NOT GREATER THAN 5X10-2 AND NOT LESS THAN 1.4X10-5, THE CONCENTRATION OF SAID ACID BEING SUFFICIENT TO REACT WITH SAID COLOR TO FORM A SALT THEREWITH BUT INSUFFICIENT TO DISSOLVE SUBSTANTIAL QUANTITIES OF SAID COLOR.
Claim 2
Dependent Claim
82 words
IN A PROCESS OF ACID-SWELLING A PREMILLED CHLORINEFREE PHTHALOCYANINE COLOR OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE AND METAL-FREE PHTHALOCYANINE, THE IMPROVEMENT WHICH CONSISTS OF SELECTING FOR SAID SWELLING TREATMENT AN ACID WHICH IS LIQUID AT THE TEMPERATURE OF THE TREATMENT AND WHICH HAS AN IONIZAATION CONSTANT NOT GREATER THAN 5X10-2 AND NOT LESS THAN 1.4X10-5, THE CONCENTRATION OF SAID ACID BEING SUFFICIENT TO REACT WITH SAID COLOR TO FORM A SALT THEREWITH BUT INSUFFICIENT TO DISSOLVE SUBSTANTIAL QUANTITIES OF SAID COLOR.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |