US3042683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine colouring matters
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1960-06-17
•
Granted: 1962-07-03
•
Expires: 1980-06-17
Abstract
No abstract record available.
Inventors
- 👤 Howard Harold Thompson
- 👤 Marrable Christopher David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/443; C09B62/457
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
2 words
COPPER TETRA-$DI-(B-ACETOXYETHYL)SULPHAMYL$PHTHALOCYANINE.
References Cited (Backward Citations)
US2547972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |