Patent US2683707A successfully refreshed from Google Patents.
US2683707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex chromium compounds of
Assignee: —
•
Filing: —
•
Granted: 1954-07-13
•
Expires: 1971-07-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:57
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A CHROMIUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM IN COMPLEX UNION WITH ONE MOLECULAR PROPORTION OF A MONOAZO DYESTUFF WHICH, AS FREE ACID, CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
27 words
A CHROMIUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM IN COMPLEX UNION WITH ONE MOLECULAR PROPORTION OF A MONOAZO DYESTUFF WHICH, AS FREE ACID, CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
GB189409441A
Cited
FR517473A
Cited
US1408296A
Cited
US1947945A
Cited
US2109806A
Cited
US2178054A
Cited
US2218986A
Cited
US2418416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |