US2542328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble phthalocyanines containing quaternary or ternary salt groups and synthesis thereof
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1949-03-18
•
Granted: 1951-02-20
•
Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 Haddock Norman Hulton
- 👤 Wood Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:20
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12; C09B47/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PHTHALOCYANINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL-PHTHALOCYANINES AND METAL-FREE PHTHALOCYANINES WHICH CARRY PENDANT ARYL NUCLEI ATTACHED TO THE PHENYLENE NUCLEI OF THE FUNDAMENTAL PHTHALOCYANINE COMPLEX THROUGH A MONATOMIC BRIDGING LINK, AND CHARACTERIZED BY BEARING N RADICALS OF THE TYPE -CH2X, WHEREIN N REPRESENTS A NUMERAL GREATER THAN 1, AT LEAST (N-1) OF SAID RADICALS BEING CARRIED IN SAID PENDANT ARYL NUCLEI AND X REPRESENTS AN ONIUM SALT RADICAL SELECTED FROM THE GROUP CONSISTING OF THE SULFONIUM, ISOTHIOURONIUM AND QUATERNARY AMMONIUM SALTS OF WATER-SOLUBLE ACIDS.
Claim 2
Dependent Claim
87 words
A PHTHALOCYANINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL-PHTHALOCYANINES AND METAL-FREE PHTHALOCYANINES WHICH CARRY PENDANT ARYL NUCLEI ATTACHED TO THE PHENYLENE NUCLEI OF THE FUNDAMENTAL PHTHALOCYANINE COMPLEX THROUGH A MONATOMIC BRIDGING LINK, AND CHARACTERIZED BY BEARING N RADICALS OF THE TYPE -CH2X, WHEREIN N REPRESENTS A NUMERAL GREATER THAN 1, AT LEAST (N-1) OF SAID RADICALS BEING CARRIED IN SAID PENDANT ARYL NUCLEI AND X REPRESENTS AN ONIUM SALT RADICAL SELECTED FROM THE GROUP CONSISTING OF THE SULFONIUM, ISOTHIOURONIUM AND QUATERNARY AMMONIUM SALTS OF WATER-SOLUBLE ACIDS.
References Cited (Backward Citations)
US2479491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |