US3775423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine-type dyestuffs
Assignee: Rhodiaceta SA
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Filing: 1971-09-17
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Granted: 1973-11-27
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Expires: 1991-09-17
Abstract
Abstract THE INVENTION PROVIDES NEW PHTHALOCYANINE-DYESTUFFS DERIVED AT LEAST IN PART FROM NAPHTHYLENE OR PERYLENE DICARBOXYLIC ACID AND CONTAINING ESTER GROUPS, WHICH CAN BE USED IN COLOURING POLYESTERS AND POLYAMIDES.
Inventors
- 👤 B Lamure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:18
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C09; C09B; C09B47/00; C09B47/04; C09B47/06
Claims Analysis
Total Claims: 0
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |