US3246004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New dyestuffs containing benzazolylmercapto substituents
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1962-12-31
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Granted: 1966-04-12
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Hall Frank
- 👤 Heslop Robert Norman
- 👤 Lodge Frank
- 👤 Rattee Ian Durham
- 👤 Waite Frederick Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:36
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/443; C09B62/447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
DYESTUFFS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
DYESTUFFS OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |