Patent US3740244A successfully refreshed from Google Patents.
US3740244A
Expired / Lapsed
US
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Process for producing colored pearl essences
Assignee: Asahi Kasei Corp
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Filing: 1971-05-06
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Granted: 1973-06-19
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Expires: 1991-05-06
Abstract
Abstract CRYSTALS EXHIBITING PEARL LUSTER OF VARIOUS COLOR TONES (PEARL ESSENCES) WHICH HAVE SMOOTH SURFACES AND ARE UNIFORM IN SIZE ARE OBTAINED IN HIGH YIELDS BY CRYSTALLIZING ACCORDING TO AN ORDINARY PROCEDURE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NUCLEIC ACID-RELATED COMPOUNDS, TRIAZINE COMPOUNDS AND BASIC LEAD CARBONATE FROM AN AQUEOUS SOLUTION OF SAID COMPOUND IN THE PRESENCE OF A WATER-SOLUBLE DYE. THE THUS OBTAINED COLORED PEARL ESSENCES ARE INCORPORATED INTO PLASTIC MATERIALS OR THE LIKE TO PROVIDE COLORING AND DECORATIVE EFFECTS WHICH CANNOT BE ATTAINED BY THE USE OF DYES ALONE.
Inventors
- 👤 N Yano
- 👤 M Kishi
- 👤 M Fukushima
- 👤 I Fukinbara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:22
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0018; C09B; C09B67/00; C09B67/0098; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C09C2200/00; C09C2200/10; C09C2200/1062; C09C2200/1075; C09C2200/1087; C09C2200/30; C09C2200/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |