US2953560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazine azo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1957-06-07
•
Granted: 1960-09-20
•
Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Baker Ronald
- 👤 Hadfield Harry Rose
- 👤 Johnson Eric Leslie
- 👤 Stephen William Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
WATER-INSOLUBLE AZO DYESTUFFS OF THE FORMULA:
Claim 2
Dependent Claim
6 words
WATER-INSOLUBLE AZO DYESTUFFS OF THE FORMULA:
References Cited (Backward Citations)
US1667312A
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US2211709A
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US2270478A
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US2273117A
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US2273115A
Cited
US2258977A
Cited
US2392649A
Cited
US2418336A
Cited
US2444013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |