Patent US3351594A successfully refreshed from Google Patents.
US3351594A
Expired / Lapsed
US
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Phthalocyanine dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-04-01
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Granted: 1967-11-07
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Clark Peter Frederick
- 👤 Poole Victor David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:00
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/66; C; C09; C09B; C09B62/00; C09B62/002; C09B62/016; C09B62/02; C09B62/04; C09B62/043; C09B62/08; C09B62/085; C09B62/44; C09B62/4401; C09B62/4403
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |