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Patent US3331831A successfully refreshed from Google Patents.
US3331831A
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US
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Benzindole basic dyestuffs
Assignee: Bayer AG
•
Filing: 1964-06-16
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Granted: 1967-07-18
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Raue Roderich
- 👤 Brack Alfred
- 👤 Rohe Ernst-Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
C; C09; C09B; C09B26/00; C09B26/02; C09B26/04; C09B44/00; C09B44/10; C09B44/12; C09B44/123; C09B57/00; C09B57/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US2815338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |