US3274172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo disperse dyestuffs
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1963-08-16
•
Granted: 1966-09-20
•
Expires: 1983-08-16
Abstract
No abstract record available.
Inventors
- 👤 Koike Eiji
- 👤 Kanazawa Fujio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:54
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190910187A
Cited
US1557265A
Cited
US2782185A
Cited
US3096140A
Cited
US3158435A
Cited
US3096847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |