US2686176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New cupriferous trisazo dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1953-02-02
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Granted: 1954-08-10
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Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 Gunst Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:45
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/24; C09B45/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A CUPRIFEROUS TRISAZO DYESTUFF CONTAINING A SINGLE-COPPER ATOM BOUND IN COMPLEX UNION WITH THE DYESTUFF MOLECULE AND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
21 words
A CUPRIFEROUS TRISAZO DYESTUFF CONTAINING A SINGLE-COPPER ATOM BOUND IN COMPLEX UNION WITH THE DYESTUFF MOLECULE AND CORRESPONDING 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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |