US2518077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1947-03-19
•
Granted: 1950-08-08
•
Expires: 1967-03-19
Abstract
No abstract record available.
Inventors
- 👤 Schmid Max
- 👤 Johner Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:35
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
THE AZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
USRE19527E
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US1806995A
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GB193834A
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US1878243A
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US1921361A
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DE552282C
Cited
GB339620A
Cited
GB336938A
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US1758310A
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FR724908A
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FR727665A
Cited
US1946010A
Cited
US1975830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |