US3714337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of inorganic pigments
Assignee: Rhone Poulenc SA
•
Filing: 1970-12-21
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Granted: 1973-01-30
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Expires: 1990-12-21
Abstract
Abstract METAL SULPHIDES, SULPHO-SELENIDES AND SELENIDES ARE MADE BY HEATING TOGETHER AT 340 TO 450*C. A MOLTEN MIXTURE OF METAL, SULPHUR AND/OR SELENIUM, AND SALINE FLUX.
Inventors
- 👤 P Garet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:39
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0805; C01; C01B; C01B19/00; C01B19/002; C01B19/007; C01G; C01G1/00; C01G1/12; C01G11/00; C09C; C09C1/00; C09C1/0009; C09C1/0081; C09C1/04; C09C1/06; C09C1/10; C09C1/12; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/60
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |