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US2957884A
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Anthraquinone vat dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1957-12-02
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Granted: 1960-10-25
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Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Moergeli Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:18
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1880440A
Cited
US2147569A
Cited
DE696423C
Cited
US2095468A
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US2228455A
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US2629718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |