Patent US3139326A successfully refreshed from Google Patents.
US3139326A
Expired / Lapsed
US
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Method and apparatus for the production of molybdenum trioxide
Assignee: Avantor Performance Materials LLC
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Filing: 1960-01-29
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Granted: 1964-06-30
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Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Walter H Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
C; C01; C01G; C01G39/00; C01G39/02; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A METHOD OF PREPARING MOLYBDENUM TRIOXIDE OF HIGH PURITY WHICH COMPRISES THE STEPS OF SUSPENDING MOLYBDENUM DISULFIDE HAVING A PARTICLE SIZE SMALLER THAN ABOUT 20 MESH IN THE ATMOSPHERE OF A CHAMBER HEATED TO AT LEAST 1800*F. WHILE ALSO INTRODUCING INTO SAID CHAMBER A FLOW OF PREHEATED AIR WHEREBY A TURBULENT ATMOSPHERIC CONDITION OF A TEMPERATURE OF AT LEAST 1800*F. IS CREATED AND SUBSTANTIALLY ALL OF THE SUSPENDED FINELY DIVIDED MOLYBDENUM DISULFIDE IS OXIDIZED AND SUBLIMED SUBSTANTIALLY, INSTANTANEOUSLY INTO MOLYBDENUM TRIOXIDE, SEPARATING THE SUBLIMED MOLYBDENUM TRIOXIDE FROM NON-VOLATILE IMPURITIES WHILE THE GASES HAVE A TEMPERATURE IN EXCESS OF 1350* F., COOLING THE MOLYBDENUM TRIOXIDE VAPORS TO WITHIN THE RANGE 350*F. TO 1200*F. AND SEPARATING THE CONDENSED MOLYBDENUM TRIOXIDE FROM THE HOT GASES ASSOCIATED WITH IT.
Claim 2
Independent Claim
125 words
A METHOD OF PREPARING MOLYBDENUM TRIOXIDE OF HIGH PURITY WHICH COMPRISES THE STEPS OF SUSPENDING MOLYBDENUM DISULFIDE HAVING A PARTICLE SIZE SMALLER THAN ABOUT 20 MESH IN THE ATMOSPHERE OF A CHAMBER HEATED TO AT LEAST 1800*F. WHILE ALSO INTRODUCING INTO SAID CHAMBER A FLOW OF PREHEATED AIR WHEREBY A TURBULENT ATMOSPHERIC CONDITION OF A TEMPERATURE OF AT LEAST 1800*F. IS CREATED AND SUBSTANTIALLY ALL OF THE SUSPENDED FINELY DIVIDED MOLYBDENUM DISULFIDE IS OXIDIZED AND SUBLIMED SUBSTANTIALLY, INSTANTANEOUSLY INTO MOLYBDENUM TRIOXIDE, SEPARATING THE SUBLIMED MOLYBDENUM TRIOXIDE FROM NON-VOLATILE IMPURITIES WHILE THE GASES HAVE A TEMPERATURE IN EXCESS OF 1350* F., COOLING THE MOLYBDENUM TRIOXIDE VAPORS TO WITHIN THE RANGE 350*F. TO 1200*F. AND SEPARATING THE CONDENSED MOLYBDENUM TRIOXIDE FROM THE HOT GASES ASSOCIATED WITH IT.
Claim 3
Dependent Claim
170 words
APPARATUS FOR THE PREPARATION OF PURE MOLYBDENUM TRIOXIDE WHICH COMPRISES A COMBUSTION CHAMBER, MEANS FOR HEATING THE ATMOSPHERE WITHIN SAID COMBUSTION CHAMBER TO TEMPERATURES OF AT LEAST 1800*F., MEANS FOR INTRODUCING AIR INTO SAID COMBUSTION CHAMBER IN A TURBULENT MANNER, MEANS FOR INTRODUCING FINELY DIVIDED MOLYBDENUM CONTAINING MATERIAL INTO SAID COMBUSTION CHAMBER WHEREBY IT IS CAUGHT IN A HOT TURBULENT AIR STREAM AND OXIDIZED AND SUBLIMED WHILE SUSPENDED IN THE ATMOSPHERE WITHIN THE COMBUSTION CHAMBER, A BAFFLED PASSAGEWAY LEADING FROM SAID COMBUSTION CHAMBER, A HEAT RESISTANT FILLER ELEMENT IN SAID PASSAGEWAY, MEANS FOR INTRODUCING AIR INTO SAID PASSAGEWAY TO MIX WITH THE VOLATILE GASES BEFORE PASSING THROUGH SAID FILTER ELEMENT TO DILUTE AND COOL THE SAID VOLATILE GAS STREAM TO NOT LESS THAN 1350*F. AND MEANS FOR INTRODUCING COOLING AIR TO SAID PASSAGEWAY AFTER THE SAID FILTER ELEMENT WHEREBY THE GASES MAY BE COOLED TO TEMPERATURES WITHIN THE RANGE 350*F. TO 1200*F., MEANS TO SEPARATE CONDENSED MOLYBDENUM TRIOXIDE, FROM SAID COOLED GASES, AND MEANS FOR RECOVERING SAID CONDENSED MOLYBDENUM TRIOXIDE.
Claim 4
Dependent Claim
170 words
APPARATUS FOR THE PREPARATION OF PURE MOLYBDENUM TRIOXIDE WHICH COMPRISES A COMBUSTION CHAMBER, MEANS FOR HEATING THE ATMOSPHERE WITHIN SAID COMBUSTION CHAMBER TO TEMPERATURES OF AT LEAST 1800*F., MEANS FOR INTRODUCING AIR INTO SAID COMBUSTION CHAMBER IN A TURBULENT MANNER, MEANS FOR INTRODUCING FINELY DIVIDED MOLYBDENUM CONTAINING MATERIAL INTO SAID COMBUSTION CHAMBER WHEREBY IT IS CAUGHT IN A HOT TURBULENT AIR STREAM AND OXIDIZED AND SUBLIMED WHILE SUSPENDED IN THE ATMOSPHERE WITHIN THE COMBUSTION CHAMBER, A BAFFLED PASSAGEWAY LEADING FROM SAID COMBUSTION CHAMBER, A HEAT RESISTANT FILLER ELEMENT IN SAID PASSAGEWAY, MEANS FOR INTRODUCING AIR INTO SAID PASSAGEWAY TO MIX WITH THE VOLATILE GASES BEFORE PASSING THROUGH SAID FILTER ELEMENT TO DILUTE AND COOL THE SAID VOLATILE GAS STREAM TO NOT LESS THAN 1350*F. AND MEANS FOR INTRODUCING COOLING AIR TO SAID PASSAGEWAY AFTER THE SAID FILTER ELEMENT WHEREBY THE GASES MAY BE COOLED TO TEMPERATURES WITHIN THE RANGE 350*F. TO 1200*F., MEANS TO SEPARATE CONDENSED MOLYBDENUM TRIOXIDE, FROM SAID COOLED GASES, AND MEANS FOR RECOVERING SAID CONDENSED MOLYBDENUM TRIOXIDE.
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |