US2547972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon-soluble phthalocyanines
Assignee: GAF Chemicals Corp
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Filing: 1950-01-10
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Granted: 1951-04-10
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Expires: 1970-01-10
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Tellis A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:00
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12; C09B47/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A HYDROCARBON-SOLUBLE METAL PHTHALOCYANINE CONTAINING 1 TO 6 AMINO METHYL GROUPS AS NUCLEAR SUBSTITUENTS IN THE BENZENE RINGS OF THE PHTHALOCYANINE NUCLEUS, SAID AMINO METHYL GROUPS HAVING NOT MORE THAN ONE HYDROGEN ATTACHED TO THE NITROGEN ATOMS THEREOF, AND WHEREIN THE OTHER RADICALS ATTACHED TO THE AMINO METHYL GROUPS CONTAIN NO WATER-SOLUBILIZING GROUPS, AND AT LEAST ONE OF SAID RADICALS CONTAINS AT LEAST 4 CARBON ATOMS.
Claim 2
Dependent Claim
66 words
A HYDROCARBON-SOLUBLE METAL PHTHALOCYANINE CONTAINING 1 TO 6 AMINO METHYL GROUPS AS NUCLEAR SUBSTITUENTS IN THE BENZENE RINGS OF THE PHTHALOCYANINE NUCLEUS, SAID AMINO METHYL GROUPS HAVING NOT MORE THAN ONE HYDROGEN ATTACHED TO THE NITROGEN ATOMS THEREOF, AND WHEREIN THE OTHER RADICALS ATTACHED TO THE AMINO METHYL GROUPS CONTAIN NO WATER-SOLUBILIZING GROUPS, AND AT LEAST ONE OF SAID RADICALS CONTAINS AT LEAST 4 CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |