US2974053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-stable bismuth oxychloride nacreous pigment and method of preparing same
Assignee: FRANCIS EARLE LAB Inc
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Filing: 1958-02-07
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Granted: 1961-03-07
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Expires: 1978-02-07
Abstract
No abstract record available.
Inventors
- 👤 Suchow Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:09
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0018; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A NACREOUS COMPOSITION CONSISTING ESSENTIALLY OF A PASTE OF A LIGHT-TRANSMITTING, FILM-FORMING VEHICLE HAVING, AS A NACRE-PRODUCING PIGMENT THEREIN FLAT, PLATE-LIKE CRYSTALS OF BISMUTH OXYCHLORIDE, SAID CRYSTALS HAVING A THICKNESS NOT GREATER THAN 1 MICRON AND A DIAMETER TO THICKNESS RATIO OF AT LEAST FOUR, SAID COMPOSITION BEING MADE STABLE TO ULTRAVIOLET LIGHT BY THE INCLUSION THEREIN OF AT LEAST 0.005 PERCENT OF A 2-HYDROXY BENZOPHENONE LIGHTSTABLIZING COMPOUND, THE WEIGHT RATIO OF SAID COMPOUND TO THE SAID BISMUTH OXYCHLORIDE NACREOUS PIGMENT BEING IN THE RANGE OF ABOUT 2-75:100.
Claim 2
Dependent Claim
88 words
A NACREOUS COMPOSITION CONSISTING ESSENTIALLY OF A PASTE OF A LIGHT-TRANSMITTING, FILM-FORMING VEHICLE HAVING, AS A NACRE-PRODUCING PIGMENT THEREIN FLAT, PLATE-LIKE CRYSTALS OF BISMUTH OXYCHLORIDE, SAID CRYSTALS HAVING A THICKNESS NOT GREATER THAN 1 MICRON AND A DIAMETER TO THICKNESS RATIO OF AT LEAST FOUR, SAID COMPOSITION BEING MADE STABLE TO ULTRAVIOLET LIGHT BY THE INCLUSION THEREIN OF AT LEAST 0.005 PERCENT OF A 2-HYDROXY BENZOPHENONE LIGHTSTABLIZING COMPOUND, THE WEIGHT RATIO OF SAID COMPOUND TO THE SAID BISMUTH OXYCHLORIDE NACREOUS PIGMENT BEING IN THE RANGE OF ABOUT 2-75:100.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |