US2963472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1958-09-25
•
Granted: 1960-12-06
•
Expires: 1978-09-25
Abstract
No abstract record available.
Inventors
- 👤 Seitz Karl
- 👤 Riat Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:46
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/24; C09B45/04; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
DISAZO-DYESTUFFS WHICH CONTAIN ONE ATOM OF ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT BOUND IN COMPLEX UNION TO TWO MOLECULES OF A DISAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
33 words
DISAZO-DYESTUFFS WHICH CONTAIN ONE ATOM OF ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT BOUND IN COMPLEX UNION TO TWO MOLECULES OF A DISAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2749206A
Cited
US2221361A
Cited
US2538568A
Cited
US2617797A
Cited
US2756224A
Cited
US2762794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |