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US3804741A Expired / Lapsed US ⏱️ 0.0 years remaining

Hydrocarbon conversion and hydrocracking with layered complex metal silicate and chrysotile compositions

Assignee: Velsicol Chemical LLC
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Filing: 1972-03-09
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Granted: 1974-04-16
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Expires: 1992-03-09
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Abstract

Abstract A NEW AND IMPROVED PROCESS FOR THE PREPARATION OF LAYERED COMPLEX METAL SILICATES, ESPECIALLY CHRYSOTILES, AT LOW SEVERITY CONDITIONS. THESE CRYSTALLINE FORM OF COMPLEX METAL SILICATE, FOR SHAPE RANGING FROM THICK WALL TUBES THROUGH THIN WALL TUBES, AND THIN WALL TUBES THROUGH FLAKES, CAN BE PRODUCED, WITH HIGH SURFACE AREA, AS DESIRED, IN HYDRATED FORM, BY CONTACT OF SUITABLE SILICA AND METAL SOURCES IN A REACTION OR SYNTHESIS MIXTURE AT PH OF AT LEAST ABOUT 10, AND PREFERABLY FROM ABOUT 12 TO 14, AT MODERATE TEMPERATURES AND PRESSURES. THE PROCESS CAN PRODUCE CHRYSOTILES, SOME OF WHICH HAVE BE FOUND TO EXIST IN NATURE, OR HETERFORE SYNTHETICALLY PRODUCED, BUT CAN AS WELL PRODUCE CHRYSOLITE SPECIES WHICH DIFFER CHEMICALLY OR PHYSICALLY, OR BOTH, FROM PREVIOUSLY KNOWN SPECIES. NEW AND NOVEL FORMS OF CHRYSOTILE ARE IMPROVED IN MANY OF THEIR PHYSICAL AND CHEMICAL CHARACTERISTICS AS CONTRASTED WITH PREVIOUS SPECIES, AND ARE PARTICULARLY USEFUL DIRECTLY OR INDIRECTLY IN CONDUCTING HYDROCARBON CONVERSION REACTIONS.

Inventors

  • 👤 H Robson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 16:55
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; B; B01; B01J; B01J21/00; B01J21/12; B01J21/16; C01B33/22; C01B33/26; C01B33/36; C01B33/38; C01B33/40; C01B33/42; C01B33/46; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789; C07C5/2791; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G35/00; C10G35/04; C10G35/06; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; C10G49/00; C10G49/02; C10G49/08; C07C2521/00; C07C2521/06; C07C2521/08; C07C2521/10; C07C2521/16; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/30; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755

Claims Analysis

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References 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) 1977-04-15 1977-10-15 1978-04-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-04-15 1981-10-15 1982-04-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-04-15 1985-10-15 1986-04-16 $7700.00 Window Closed / Lapsed

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