US2635946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of finely divided metallic oxides useful as pigments
Assignee: Saeurefabrik Schweizerhall
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Filing: 1952-05-21
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Granted: 1953-04-21
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Weber Robert
- 👤 Frey Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01P; C01P2006/00; C01P2006/10; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR PRODUCING A PIGMENTARY METALLIC OXIDE FROM AN OXIDIZABLE VOLATILE METALLIC HALIDE, WHICH COMPRISES CONTINUOUSLY FLOWING INTO A REACTION ZONE A GASEOUS REACTION MIXTURE OF SUCH HALIDE AND OXYGEN CONTAINING GAS, FLOWING SEPARATELY THEREINTO AT LEAST ONE AUXILIARY COMBUSTIBLE GAS AND AT LEAST ONE AUXILIARY OXIDIZING GAS, REACTING TOGETHER THESE TWO TYPES OF AUXILIARY GASES TO MAINTAIN AN AUXILIARY FLAME IN SAID ZONE, AND BURNING SAID MIXTURE IN CONTACT WITH SAID AUXILIARY FLAME: SUBDIVIDING THE INFLOWING REACTION MIXTURE INTO A PLURALITY OF INDIVIDUAL STREAMS SPACED APART AND GROUPED IN A PATTERN DEFINING A CLOSED FIGURE, FLOWING AUXILIARY GAS OF ONE OF SAID TYPES INTO SAID ZONE AROUND EACH OF SAID INDIVIDUAL STREAMS, AND FLOWING THE AUXILIARY GAS OF THE OTHER OF SAID TYPES INTO SAID ZONE IN PART OUTSIDE SAID PATTERN OF INDIVIDUAL STREAMS AND IN PART INSIDE SAID PATTERN.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR PRODUCING A PIGMENTARY METALLIC OXIDE FROM AN OXIDIZABLE VOLATILE METALLIC HALIDE, WHICH COMPRISES CONTINUOUSLY FLOWING INTO A REACTION ZONE A GASEOUS REACTION MIXTURE OF SUCH HALIDE AND OXYGEN CONTAINING GAS, FLOWING SEPARATELY THEREINTO AT LEAST ONE AUXILIARY COMBUSTIBLE GAS AND AT LEAST ONE AUXILIARY OXIDIZING GAS, REACTING TOGETHER THESE TWO TYPES OF AUXILIARY GASES TO MAINTAIN AN AUXILIARY FLAME IN SAID ZONE, AND BURNING SAID MIXTURE IN CONTACT WITH SAID AUXILIARY FLAME: SUBDIVIDING THE INFLOWING REACTION MIXTURE INTO A PLURALITY OF INDIVIDUAL STREAMS SPACED APART AND GROUPED IN A PATTERN DEFINING A CLOSED FIGURE, FLOWING AUXILIARY GAS OF ONE OF SAID TYPES INTO SAID ZONE AROUND EACH OF SAID INDIVIDUAL STREAMS, AND FLOWING THE AUXILIARY GAS OF THE OTHER OF SAID TYPES INTO SAID ZONE IN PART OUTSIDE SAID PATTERN OF INDIVIDUAL STREAMS AND IN PART INSIDE SAID PATTERN.
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |