US3356671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing unsymmetrical 1:2-cobalt complexed azo compounds
Assignee: Imperial Chemical Industries Ltd
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Filing: 1965-03-17
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Granted: 1967-12-05
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Johnson Alan
- 👤 Mack Peter Albert
- 👤 Price Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/04; C09B45/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF THE 1:2COBALT COMPLESES WHICH, IN THE FORM OF THE FREE ACIDS, ARE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
23 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF THE 1:2COBALT COMPLESES WHICH, IN THE FORM OF THE FREE ACIDS, ARE REPRESENTED BY 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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |