US3005813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1954-05-20
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Granted: 1961-10-24
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Expires: 1974-05-20
Abstract
No abstract record available.
Inventors
- 👤 Brassel Jakob
- 👤 Buehler Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:39
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A COMPLEX CHLORIMUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM IN COMPLEX UNION WITH TWO MOLECULES OF TWO DIFFERENT ORTHO:ORTHO''-DIHYDROXY MONOAZO-DYESTUFFS OF WHICH ONE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
27 words
A COMPLEX CHLORIMUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM IN COMPLEX UNION WITH TWO MOLECULES OF TWO DIFFERENT ORTHO:ORTHO''-DIHYDROXY MONOAZO-DYESTUFFS OF WHICH ONE CORRESPONDS 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) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |