Patent US3446569A successfully refreshed from Google Patents.
US3446569A
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Aqueous solutions of phthalocyanine pigments and process for preparing them
Assignee: Hoechst AG
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Filing: 1964-05-05
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Granted: 1969-05-27
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Oskar Braun
- 👤 Richard Gross
- 👤 Herbert Nakaten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:16
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; C; C09; C09B; C09B67/00; C09B67/0032; C09B67/0071; C09B67/0083; D06P1/00; D06P1/0048; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/655; D06P1/66
Claims Analysis
Total Claims: 0
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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) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |