US2669561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper complex compounds of
Assignee: —
•
Filing: —
•
Granted: 1954-02-16
•
Expires: 1971-02-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:25
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/18; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; D; D06; D06P; D06P1/00; D06P1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AS NEW PRODUCTS THE COPPER COMPLEX COMPOUNDS OF MONOAZO DYESTUFFS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
14 words
AS NEW PRODUCTS THE COPPER COMPLEX COMPOUNDS OF MONOAZO DYESTUFFS OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US1959844A
Cited
GB436095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |