Patent US2940826A successfully refreshed from Google Patents.
US2940826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zirconium tetrachloride production
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-09-12
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Granted: 1960-06-14
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Expires: 1977-09-12
Abstract
No abstract record available.
Inventors
- 👤 John W Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:10
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD FOR CONTINUOUS, STEADY-STATE PRODUCTION OF ZIRCONIUM TETRACHLORIDE BY THE CHLORINATION OF SOLID BONDED AGGLOMERATES OF: FINELY DIVIDED ZIRCONIUM OXIDEBEARING MATERIAL OF WHICH AT LEAST 80% WILL PASS A 200MESH SCREEN, AND FINELY DIVIDED SOLID CARBONACEOUS REDUCING AGENT OF WHICH AT LEAST 80% WILL PASS A 140-MESH SCREEN, THE AMOUNT OF CARBONACEOUS REDUCING AGENT IN SAID AGGLOMERATES BEING STOICHIOMETRICALLY SUFFICIENT TO CONVERT ALL THE OXYGEN IN SAID ZIRCONIUM OXIDE-BEARING MATERIAL TO THE CARBON MONOXIDE/CARBON DIOXIDE MIXTURE PRODUCED UNDER THE EXISTISNG CHLORINATION CONDITIONS, SAID FINELY DIVIDED ZIRCONIUM OXIDE-BEARING MATERIAL AND SAID FINELY DIVIDED CARBONACEOUS REDUCING AGENT BEING BONDED TOGETHER WITH AN INORGANIC CHEMICAL BINDER OF SUFFICIENT STRENGTH TO PREVENT SUBSTANTIAL PHYSICAL DEGRADATION OF THE AGGLOMERATES DURING CHLORATION THEREOF, SAID
Claim 2
Independent Claim
119 words
A METHOD FOR CONTINUOUS, STEADY-STATE PRODUCTION OF ZIRCONIUM TETRACHLORIDE BY THE CHLORINATION OF SOLID BONDED AGGLOMERATES OF: FINELY DIVIDED ZIRCONIUM OXIDEBEARING MATERIAL OF WHICH AT LEAST 80% WILL PASS A 200MESH SCREEN, AND FINELY DIVIDED SOLID CARBONACEOUS REDUCING AGENT OF WHICH AT LEAST 80% WILL PASS A 140-MESH SCREEN, THE AMOUNT OF CARBONACEOUS REDUCING AGENT IN SAID AGGLOMERATES BEING STOICHIOMETRICALLY SUFFICIENT TO CONVERT ALL THE OXYGEN IN SAID ZIRCONIUM OXIDE-BEARING MATERIAL TO THE CARBON MONOXIDE/CARBON DIOXIDE MIXTURE PRODUCED UNDER THE EXISTISNG CHLORINATION CONDITIONS, SAID FINELY DIVIDED ZIRCONIUM OXIDE-BEARING MATERIAL AND SAID FINELY DIVIDED CARBONACEOUS REDUCING AGENT BEING BONDED TOGETHER WITH AN INORGANIC CHEMICAL BINDER OF SUFFICIENT STRENGTH TO PREVENT SUBSTANTIAL PHYSICAL DEGRADATION OF THE AGGLOMERATES DURING CHLORATION THEREOF, SAID
References Cited (Backward Citations)
GB466705A
Cited
US2608464A
Cited
GB689012A
Cited
GB763308A
Cited
FR1113883A
Cited
GB773535A
Cited
FR1128603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |