US3308114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsymmetrical chromium containing azo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1963-05-14
•
Granted: 1967-03-07
•
Expires: 1983-05-14
Abstract
No abstract record available.
Inventors
- 👤 Blackhall Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/443; C09B62/447; C09B62/455; C09B62/002; C09B62/006; C09B62/012; C09B62/465; C09B62/47; C09B62/477
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
THE CHROMIUM-CONTAINING AZO DYSTUFFS WHICH, IN THE FORM OF THE FREE ACIDS, ARE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
17 words
THE CHROMIUM-CONTAINING AZO DYSTUFFS WHICH, IN THE FORM OF THE FREE ACIDS, ARE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
BE565447A
Cited
US3057673A
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US2806760A
Cited
DE1007451B
Cited
US2943084A
Cited
US3009920A
Cited
FR1245115A
Cited
US3086967A
Cited
US3114745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |