US2765319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polychloro copper phthalocyanine
Assignee: EIDP Inc
•
Filing: 1952-03-27
•
Granted: 1956-10-02
•
Expires: 1972-03-27
Abstract
No abstract record available.
Inventors
- 👤 Barnhart George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR IMPROVING THE TINCTORIAL QUALITIES OF CRUDE POLYCHLORO COPPER PHYTALOCYANINE, WHICH COMPRISES PRODUCIND A SLURRY OF THE COLOR IN SULFIC ACID OF 98% 99% INITIAL STRENGTH WHICH CONTAINS SOLID CRYSTALS OF AN INORGANIC COMPLEX OF SODIUM SULFATE AND SULFURIC ACID, STIRRING SAID SLURRY OF COLOR, ACID AND COMPLEX CRYSTALS, AT A TEMPERATURE BETWEEN 15* AND 35* C., FOR A PERIOD OF TIME SUFFICIENT TO EFFECT PERMUTOID SWELLING OF THE COLOR, AND SUBSEQUENTLY RECOVERING THE COLOR FROM SAID SLURRY BY DILUTION WITH WATER AND FILTERING.
Claim 2
Dependent Claim
86 words
A PROCESS FOR IMPROVING THE TINCTORIAL QUALITIES OF CRUDE POLYCHLORO COPPER PHYTALOCYANINE, WHICH COMPRISES PRODUCIND A SLURRY OF THE COLOR IN SULFIC ACID OF 98% 99% INITIAL STRENGTH WHICH CONTAINS SOLID CRYSTALS OF AN INORGANIC COMPLEX OF SODIUM SULFATE AND SULFURIC ACID, STIRRING SAID SLURRY OF COLOR, ACID AND COMPLEX CRYSTALS, AT A TEMPERATURE BETWEEN 15* AND 35* C., FOR A PERIOD OF TIME SUFFICIENT TO EFFECT PERMUTOID SWELLING OF THE COLOR, AND SUBSEQUENTLY RECOVERING THE COLOR FROM SAID SLURRY BY DILUTION WITH WATER AND FILTERING.
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |