Patent US2508404A successfully refreshed from Google Patents.
US2508404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromiferous monazo dyes and methods of manufacturing the same
Assignee: EIDP Inc
•
Filing: 1948-07-07
•
Granted: 1950-05-23
•
Expires: 1968-07-07
Abstract
No abstract record available.
Inventors
- 👤 Donovan E Kvalnes
- 👤 Boyce G Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:44
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE PROCESS OF MANUFACTURING A SOLUBLE CHROMIUM COMPLEX OF A MONAZO COMPOUND CONTAINING ON ATOM OF CHROMIUM FOR EACH MOLECULE OF THE MONAZO COMPOUND, WHICH COMPRISES MAKING A METALLIZING MEDIUM COMPOSED ESSENTIALLY OF A WATER SOLUTION OF THE MONAZO COMPOUND REPRESENTED IN ITS ACID FORM BY THE FORMULA
Claim 2
Dependent Claim
48 words
THE PROCESS OF MANUFACTURING A SOLUBLE CHROMIUM COMPLEX OF A MONAZO COMPOUND CONTAINING ON ATOM OF CHROMIUM FOR EACH MOLECULE OF THE MONAZO COMPOUND, WHICH COMPRISES MAKING A METALLIZING MEDIUM COMPOSED ESSENTIALLY OF A WATER SOLUTION OF THE MONAZO COMPOUND REPRESENTED IN ITS ACID FORM BY THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |