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US2493975A
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Trisazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1946-05-29
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Granted: 1950-01-10
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Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 Kaiser Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:48
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/16; C09B31/22; C09B43/00; C09B43/12; C09B43/136; C09B43/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A TRISAZO-DYESTUFF, CAPABLE OF BEING METALLIZED, OF THE FORMULA
Claim 2
Dependent Claim
9 words
A TRISAZO-DYESTUFF, CAPABLE OF BEING METALLIZED, OF THE FORMULA
References Cited (Backward Citations)
US1667312A
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US1788295A
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US2084731A
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US2215087A
Cited
US2270675A
Cited
US2268919A
Cited
US2396659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |