US2667404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alumina particles
Assignee: Universal Oil Products Co
•
Filing: 1951-08-30
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Granted: 1954-01-26
•
Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Haensel Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:28
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS FOR THE PRODUCTION OF ALUMINA PARTICLES FROM A SOLUTION OF A CHLORIDE OF ALUMINUM WHICH COMPRISES SUPPLYING A STREAM OF SAID SOLUTION TO A DRYING ZONE, INTRODUCING AMMONIA INTO SAID STREAM WHILE IN TRANSIT TO SAID ZONE, PROMPTLY THEREAFTER SPRAYING THE RESULTANT MIX-
Claim 2
Dependent Claim
45 words
A PROCESS FOR THE PRODUCTION OF ALUMINA PARTICLES FROM A SOLUTION OF A CHLORIDE OF ALUMINUM WHICH COMPRISES SUPPLYING A STREAM OF SAID SOLUTION TO A DRYING ZONE, INTRODUCING AMMONIA INTO SAID STREAM WHILE IN TRANSIT TO SAID ZONE, PROMPTLY THEREAFTER SPRAYING THE RESULTANT MIX-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |