Patent US2749332A successfully refreshed from Google Patents.
US2749332A
Expired / Lapsed
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Metalliferous azo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1952-08-15
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Granted: 1956-06-05
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Expires: 1972-08-15
Abstract
No abstract record available.
Inventors
- 👤 Buehler Arthur
- 👤 Zickendraht Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:35
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METALLIFEROUS COMPOUND CONTAINING TWO MONOAZODYESTUFFS SO BOUND IN COMPLEX UNION WITH A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM THAT THE PROPORTION OF THE NUMBER OF METAL ATOMS IN COMPLEX UNION TO THE NUMBER OF MONOAZO-DRYSTUFF MOLECULES IS SUBSTANTIALLY 1:2, IN WHICH METALLIFEROUS COMPOUND ONE OF THE MONOAZO-DRYSTUFFS PRESENT CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
57 words
A METALLIFEROUS COMPOUND CONTAINING TWO MONOAZODYESTUFFS SO BOUND IN COMPLEX UNION WITH A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM THAT THE PROPORTION OF THE NUMBER OF METAL ATOMS IN COMPLEX UNION TO THE NUMBER OF MONOAZO-DRYSTUFF MOLECULES IS SUBSTANTIALLY 1:2, IN WHICH METALLIFEROUS COMPOUND ONE OF THE MONOAZO-DRYSTUFFS PRESENT 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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |