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US3457252A
Expired / Lapsed
US
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Metal complexes of disazo-dyestuffs
Assignee: Hoechst AG
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Filing: 1966-09-06
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Granted: 1969-07-22
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Fritz Meininger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:19
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/061; C09B31/068; C09B31/072; C09B45/00; C09B45/02; C09B45/24; C09B62/00; C09B62/44; C09B62/443; C09B62/447; C09B62/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3364194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |