Patent US3423391A successfully refreshed from Google Patents.
US3423391A
Expired / Lapsed
US
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Continuous diazotization process
Assignee: BASF SE
•
Filing: 1967-02-20
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Granted: 1969-01-21
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Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Hubert Kindler
- 👤 Dominik Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:19
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26; C07D249/00; C07D249/02; C07D249/04; C09; C09B; C09B29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2622078A
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US2714104A
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GB812368A
Cited
US2845326A
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US3203989A
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US3148179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |