US3732201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-chloro-1,2,4-thiadiazolyl-5 and 3-chloro-1,2,4-thiadiazolium-5 azo dyestuffs
Assignee: Novartis AG
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Filing: 1970-02-16
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Granted: 1973-05-08
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Expires: 1990-02-16
Abstract
Abstract A DYESTUFF OF THE FORMULA D-N=N-(B-N=N)(N-1)-A(-Z-A-N=N-D)(M-1) IN WHICH D ISQUATERNATED OR UNQUATERNATED 3-HALOGENO1,2,4-THIADIAZOLYL-5-, N IS 1 OR 2, M IS 1 OR 2, N AND M TOGETHER ARE 2 OR 3, Z IS A SINGLE BOND, AN OXYGEN OR SULFUR ATOM, AN IMIDO OR SULFONYL GROUP, OR A DIVALENT ORGANIC RESIDUE, B IS A 1,4-PHENYLENE RESIDUE THAT MAY BE SUBSTITUTED, AND A IS THE RESIDUE OF ACOUPLING COMPONENT, D, B,A ANDZ BEING FREE FROM SULFONIC ACID GROUPS.
Inventors
- 👤 V Ramanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:57
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B31/00; C09B31/02; C09B33/00; C09B33/02; C09B41/00; C09B44/00; C09B44/10; C09B44/107; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/928
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |