Patent US2567822A successfully refreshed from Google Patents.
US2567822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vat dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1949-06-20
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Granted: 1951-09-11
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Expires: 1969-06-20
Abstract
No abstract record available.
Inventors
- 👤 Moergeli Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:37
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/26; C09B5/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A VAT DYESTUFF OF THE A:A''-DIANTHRIMIDE CARBAZOLE TYPE WHEREIN AT LEAST ONE FURTHER APOSITION OF THE TWO ANTHRAQUINONE NUCLEI IS OCCUPIED BY AN ORTHO-FLUOROBENZOYLAMINO GROUP.
Claim 2
Dependent Claim
25 words
A VAT DYESTUFF OF THE A:A''-DIANTHRIMIDE CARBAZOLE TYPE WHEREIN AT LEAST ONE FURTHER APOSITION OF THE TWO ANTHRAQUINONE NUCLEI IS OCCUPIED BY AN ORTHO-FLUOROBENZOYLAMINO GROUP.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |