US3261823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous ethionylaminoaryl azo-dyestuffs
Assignee: Hoechst AG
•
Filing: 1962-08-24
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Granted: 1966-07-19
•
Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Kuhne Rudolf
- 👤 Meininger Fritz
- 👤 Noll Walter
- 👤 Rinno Helmut
- 👤 Schiessler Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/18; C09B45/22; C09B45/24; D; D06; D06P; D06P1/00; D06P1/38; D06P3/00; D06P3/58; D06P3/60; D06P3/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A COMPLEX METAL COMPOUND OF AN AZO-DYESTUFF, SAID COMPOUND CONTAINING A METAL OF THE GROUP CONSISTING OF COPPER, COBALT, NICKEL, AND CHROMIUM, SAID AZO-DYESTUFF HAVING THE FORMULA
Claim 2
Dependent Claim
27 words
A COMPLEX METAL COMPOUND OF AN AZO-DYESTUFF, SAID COMPOUND CONTAINING A METAL OF THE GROUP CONSISTING OF COPPER, COBALT, NICKEL, AND CHROMIUM, SAID AZO-DYESTUFF HAVING THE FORMULA
References Cited (Backward Citations)
US2991280A
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US3007762A
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DE1082687B
Cited
US3135730A
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AT214547B
Cited
US3086730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |