Patent US3305300A successfully refreshed from Google Patents.
US3305300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon tetrachloride ore chlorination process
Assignee: Wyandotte Chemicals Corp
•
Filing: 1962-10-03
•
Granted: 1967-02-21
•
Expires: 1982-10-03
Abstract
No abstract record available.
Inventors
- 👤 Robert L Mcbrayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF CHLORINATING OXIDE ORES OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM, MOLYBDENUM AND TUNGSTEN COMPRISING THE STEPS OF MIXING PARTICLES OF SAID ORE OF A SIZE SMALLER THAN MINUS 100 U.S. STANDARD MESH WITH LIQUID CARBON TETRACHLORIDE TO FORM A SLURRY AND FORCING SAID SLURRY INTO A REACTION ZONE IN THE FORM OF AN ANNULAR SPACE DEFINED BY TWO CONCENTRIC CYLINDRICAL SURFACES, SAID REACTION ZONE BEING MAINTAINED AT A TEMPERATURE GREATER THAN 400*C.
Claim 2
Independent Claim
80 words
A METHOD OF CHLORINATING OXIDE ORES OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM, MOLYBDENUM AND TUNGSTEN COMPRISING THE STEPS OF MIXING PARTICLES OF SAID ORE OF A SIZE SMALLER THAN MINUS 100 U.S. STANDARD MESH WITH LIQUID CARBON TETRACHLORIDE TO FORM A SLURRY AND FORCING SAID SLURRY INTO A REACTION ZONE IN THE FORM OF AN ANNULAR SPACE DEFINED BY TWO CONCENTRIC CYLINDRICAL SURFACES, SAID REACTION ZONE BEING MAINTAINED AT A TEMPERATURE GREATER THAN 400*C.
References Cited (Backward Citations)
US3126256A
Cited
US2354383A
Cited
US2859097A
Cited
US2635709A
Cited
US2720447A
Cited
US2773898A
Cited
US2789880A
Cited
US2905545A
Cited
US2961293A
Cited
US3066015A
Cited
US3066010A
Cited
US3085855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |