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US2772284A
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Solvent-soluble, complex, phthalocyanine-yielding compounds
Assignee: EIDP Inc
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Filing: 1951-10-20
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Granted: 1956-11-27
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Barnhart George
- 👤 Benjamin F Skiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:21
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; Y; Y10; Y10S; Y10S8/00; Y10S8/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A LEUCO-PHTHOLOCYANINE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
6 words
A LEUCO-PHTHOLOCYANINE COMPOUND OF THE FORMULA
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |