Patent US2693467A successfully refreshed from Google Patents.
US2693467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs of the dioxazine series
Assignee: BASF Schweiz AG
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Filing: 1953-05-04
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Granted: 1954-11-02
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Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Anderau Walter
- 👤 Seitz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:59
CPC Classifications
C; C09; C09B; C09B19/00; C09B19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A DYESTUFF OF THE DIOXINE SERIES WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
11 words
A DYESTUFF OF THE DIOXINE SERIES WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |