US2610175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex chromium compounds of monoazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1950-10-31
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Granted: 1952-09-09
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Expires: 1970-10-31
Abstract
No abstract record available.
Inventors
- 👤 Widmer Willy
- 👤 Buehler Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:59
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE CHROMIUM COMPOUND WHICH CONTAINS TWO DIFFERENT MONOAZO-DYESTUFFS IN A COMPLEX IN WHICH THE PROPORTION OF THE NUMBER OF CHROMIUM ATOMS IN COMPLEX COMBINATION TO THE NUMBER OF MONOAZO-DYESTUFF MOLECULES IS ABOUT 1:2, ONE OF THE MONOAZO-DYESTUFFS PRESENT IN THE COMPLEX CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
45 words
THE CHROMIUM COMPOUND WHICH CONTAINS TWO DIFFERENT MONOAZO-DYESTUFFS IN A COMPLEX IN WHICH THE PROPORTION OF THE NUMBER OF CHROMIUM ATOMS IN COMPLEX COMBINATION TO THE NUMBER OF MONOAZO-DYESTUFF MOLECULES IS ABOUT 1:2, ONE OF THE MONOAZO-DYESTUFFS PRESENT IN THE COMPLEX CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |