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US2590346A
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Cupriferous disazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1948-06-07
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Granted: 1952-03-25
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Expires: 1968-06-07
Abstract
No abstract record available.
Inventors
- 👤 Riat Henri
- 👤 Mayer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:02
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/24; C09B45/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
A CUPRIFEROUS DISAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
FR469901A
Cited
US1889732A
Cited
US1921336A
Cited
US1921337A
Cited
US2424066A
Cited
US2426977A
Cited
US2400092A
Cited
US2536957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |