Patent US2984659A successfully refreshed from Google Patents.
US2984659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New azo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1958-10-27
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Granted: 1961-05-16
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Illy Hugo Miguel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:41
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
AN AZO-DYESTUFF WHICH CONTAINS AT LEAST ONE GROUP IMPARTING SOLUBILITY IN WATER AND WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
18 words
AN AZO-DYESTUFF WHICH CONTAINS AT LEAST ONE GROUP IMPARTING SOLUBILITY IN WATER AND WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
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US2200423A
Cited
US2274717A
Cited
US2402538A
Cited
US2398367A
Cited
US2657205A
Cited
US2720517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |