US2687410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo pigment
Assignee: EIDP Inc
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Filing: 1951-12-26
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Granted: 1954-08-24
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Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Albert R Hanke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:53
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0025; C09B67/0028; C09B67/0029
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
AS A NEW YELLOWISH-HUED, LIGHT MAROON-COLORED AZO PIGMENT, THE BETA CRYSTAL FORM OF DIAZOTIZED PARA-CHLORO-ORTHO-NITRANILINE COUPLED WITH THE ORTHO-ANISIDIDE OF 3-HYDROXY-2-NAPHTHOIC ACID CHARACTERIZED IN THAT WHEN EXPOSED TO X-RAYS IT EXHIBITS AN X-RAY DIFFRACTION PATTERN IN WHICH THE LINE OF MAXIMUM INTENSITY CORRESPONDS TO AN INTERPLANAR SPACING OF ABOUT 3.28 A., IN WHICH THE SECOND MOST INTENSE LINE CORRESPONDS TO AN INTERPLANAR SPACING OF ABOUT 6.14A., AND IN WHICH THE THIRD MOST INTENSE LINES ARE TWO OF ABOUT EQUAL INTENSITY CORRESPONDING TO INTERPLANAR SPACINGS OF ABOUT 6.96 A. AND 8.50 A.
Claim 2
Dependent Claim
91 words
AS A NEW YELLOWISH-HUED, LIGHT MAROON-COLORED AZO PIGMENT, THE BETA CRYSTAL FORM OF DIAZOTIZED PARA-CHLORO-ORTHO-NITRANILINE COUPLED WITH THE ORTHO-ANISIDIDE OF 3-HYDROXY-2-NAPHTHOIC ACID CHARACTERIZED IN THAT WHEN EXPOSED TO X-RAYS IT EXHIBITS AN X-RAY DIFFRACTION PATTERN IN WHICH THE LINE OF MAXIMUM INTENSITY CORRESPONDS TO AN INTERPLANAR SPACING OF ABOUT 3.28 A., IN WHICH THE SECOND MOST INTENSE LINE CORRESPONDS TO AN INTERPLANAR SPACING OF ABOUT 6.14A., AND IN WHICH THE THIRD MOST INTENSE LINES ARE TWO OF ABOUT EQUAL INTENSITY CORRESPONDING TO INTERPLANAR SPACINGS OF ABOUT 6.96 A. AND 8.50 A.
Claim 3
Dependent Claim
70 words
THE PROCESS OF PRODUCING A CRYSTAL FORM OF PIGMENT HAVING A RELATIVELY LIGHT MOROON SHADE OF YELLOWISH HUE WHICH COMPRISES CONVERTING TO A NEW BETA CRYSTAL PHASE THE ALPHA CRYSTAL PHASE OF THE PIGMENT OBTAINED BY COUPLING DIAZOTIZED PARA-CHLORO-ORTHO-NITRANILINE WITH THE ORTHOANISIDIDE OF 3-HYDROXY-2-NAPHTHOIC ACID BY SUBJECTING THE SAME TO CONTACT WITH AN ORGANIC LIQUID EXERTING SOLVENT ACTION THEREON, AND SALT MILLING THE RESULTING LARGE CRYSTALS TO FINELY COMMINUTED FORM.
Claim 4
Dependent Claim
70 words
THE PROCESS OF PRODUCING A CRYSTAL FORM OF PIGMENT HAVING A RELATIVELY LIGHT MOROON SHADE OF YELLOWISH HUE WHICH COMPRISES CONVERTING TO A NEW BETA CRYSTAL PHASE THE ALPHA CRYSTAL PHASE OF THE PIGMENT OBTAINED BY COUPLING DIAZOTIZED PARA-CHLORO-ORTHO-NITRANILINE WITH THE ORTHOANISIDIDE OF 3-HYDROXY-2-NAPHTHOIC ACID BY SUBJECTING THE SAME TO CONTACT WITH AN ORGANIC LIQUID EXERTING SOLVENT ACTION THEREON, AND SALT MILLING THE RESULTING LARGE CRYSTALS TO FINELY COMMINUTED FORM.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |