US3565656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel aluminum lake pigments of iron hydroxides
Assignee: Bayer Corp
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Filing: 1968-04-11
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Granted: 1971-02-23
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Expires: 1988-04-11
Abstract
Abstract SOFT, EASILY DISPERSIBLE IRON OXIDE PIGMENTS ARE OBTAINED BY LAKING, I.E. PRECIPITATING, FRESHLY PREPARED FERROUS/FERRIC HYDROXIDE TOGETHER WITH ALUMINUM HYDROXIDE, FILTERING, WASHING THE PRECIPITATE INORGANIC SALT-FREE, AND DRYING THE PRODUCT. WHEN INCORPORATED INTO SYNTHETIC RESIN SYSTEMS, E.G. THERMOSETTING ACRYLIC RESINS, PIGMENTED COATING COMPOSITIONS OF EXCELLENT FASTNESS CHARACTERISTICS AND TRANSPARENCY ARE OBTAINED.
Inventors
- 👤 Howard T Allen
- 👤 John F Santimauro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0081; C01; C01P; C01P2006/00; C01P2006/80
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |