Composition for producing pearlescent effects in cosmetic products
Abstract
Abstract BISMUTH OXYCHLORIDE IS DEPOSITED, PREFERABYLY EPITAXIALLY, ON THIN MICA PLATELETS TO PRODUCE A PEARLESCENT PIGMENT PARTICULARLY USEFUL IN COSMETIC PRODUCTS. THE PIGMENT IS PRODUCED BY ADDING A BASE TO AN AQUEOUS SUSPENSION OF MICA CONTAINING A SOLUBLE BISMUTH SALT AND AN EXCESS OF CHLORIDE IONS TO PRECIPITATE BISMUTH OXYCHLORIDE ON THE SURFACE OF THE MICA PLATELETS. PREFERABYLY A SOLUTION OF THE BISMUTH AND A SOLUTION OF THE BASE ARE SIMULTANEOUSLY ADDED TO THE MICA SUSPENSION AT RATES SUCH THAT SUSPENSION ALWAYS CONTAINS AN EXCESS OF THE SOLUBLE BISMUTH SALT. THE RESULTING PRODUCTS ARE CHARACTERIZED BY THEIR LOW DENSITY, EASE OF SUSPENSION, AND BY THE UNUSUAL TRANSLUCENCY OF THE PEARLY EFFECT WHICH THEY IMPART TO VARIOUS COSMETIC COMPOSITIONS.
Inventors
- 👤 Robert D Rands Jr
- 👤 Douglas W Chapman
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |