US2559331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of
Assignee: —
•
Filing: —
•
Granted: 1951-07-03
•
Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:38
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/18; C09B43/20; C09B43/22; C09B1/00; C09B1/02; C09B1/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
30 words
PROCESS FOR THE MANUFACTURE OF AN ESTER OF AN ORTHO:ORTHO''-DIHYDROXY-MONOAZO-DYESTUFF WHICH COMPRISES REACTING IN AN AQUEOUS ALKALINE MEDIUM THE DYESTUFF WHICH CORRESPONDS IN ITS FREE ACID STATE TO THE FORMULA
References Cited (Backward Citations)
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Cited
US808919A
Cited
US1067881A
Cited
US1667333A
Cited
US1946951A
Cited
US2120741A
Cited
US2170262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |