US2744027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo pigment production
Assignee: EIDP Inc
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Filing: 1952-11-26
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Granted: 1956-05-01
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Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 William S Struve
- 👤 Albert D Reidinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:32
CPC Classifications
C; C09; C09B; C09B63/00; C09B63/005; Y; Y10; Y10S; Y10S534/00; Y10S534/01; Y10S534/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AS A NEW INSOLUBLE AZO PIGMENT, THE CO-PRECIPITATED METALLIZED SALTS OF A MIXTURE OF FROM 5% TO 75% OF THE DYE FROM DIAZOTIZED 2-CHLORO-4-AMINO-ANISOLE-5-SULFONIC ACID WITH 3-HYDROXY-2-NAPHTHOIC ACID AND FROM 95% TO 25% OF THE DYE FROM DIAZOTIZED 2-CHLORO-4-AMINO-TOLUENE-5-SULFONIC ACID WITH 3-HYDROXY-2-NAPHTHOIC ACID.
Claim 2
Dependent Claim
43 words
AS A NEW INSOLUBLE AZO PIGMENT, THE CO-PRECIPITATED METALLIZED SALTS OF A MIXTURE OF FROM 5% TO 75% OF THE DYE FROM DIAZOTIZED 2-CHLORO-4-AMINO-ANISOLE-5-SULFONIC ACID WITH 3-HYDROXY-2-NAPHTHOIC ACID AND FROM 95% TO 25% OF THE DYE FROM DIAZOTIZED 2-CHLORO-4-AMINO-TOLUENE-5-SULFONIC ACID WITH 3-HYDROXY-2-NAPHTHOIC ACID.
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |