US3086967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-containing azo dyestuffs having sulphonyloxy-substituted alkyl sulphone groups
Assignee: Imperial Chemical Industries Ltd
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Filing: 1959-11-23
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Granted: 1963-04-23
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Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 Davies Robert Ronald
- 👤 Vellins Cyril Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:11
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/443; C09B62/447; C09B62/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2826572A
Cited
DE1002099B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |