US2820784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soichi
Assignee: —
•
Filing: —
•
Granted: 1958-01-21
•
Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:50
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/22; C09B45/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A COMPLEX COBALT COMPOUND WHICH COMPRISES A COBALT ATOMS BOUND IN COMPLEX UNION WITH SUBSTANTIALLY TWO MONOAZO DYESTUFF MOLECULES FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS AND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
31 words
A COMPLEX COBALT COMPOUND WHICH COMPRISES A COBALT ATOMS BOUND IN COMPLEX UNION WITH SUBSTANTIALLY TWO MONOAZO DYESTUFF MOLECULES FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS AND CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2674515A
Cited
US2776956A
Cited
US1835821A
Cited
US1908571A
Cited
US2565898A
Cited
US2551056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |