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Patent US3454552A successfully refreshed from Google Patents.
US3454552A
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Disazo cationic dyestuffs containing a quaternary ammonium group
Assignee: Mitsubishi Chemical Corp
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Filing: 1965-07-06
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Granted: 1969-07-08
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Expires: 1985-07-06
Abstract
No abstract record available.
Inventors
- 👤 Wataru Yamaya
- 👤 Sadao Fujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:40
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/02; C09B31/00; C09B31/02; C09B35/00; C09B35/02; C09B35/039; C09B35/04; C09B35/06
Claims Analysis
Total Claims: 0
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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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |