US2635950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making alumina pebbles
Assignee: —
•
Filing: —
•
Granted: 1953-04-21
•
Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/12; C; C01; C01F; C01F7/00; C01F7/02; C01F7/021; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/1115; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62655; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/70; C04B2235/72; C04B2235/74; C04B2235/77; C04B2235/94; C04B2235/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR MANUFACTURING HEAT AND SHOCK RESISTANT ALUMINA PEBBLES WHICH COMPRISES COMPACTING SPHERES FROM A HOMOGENEOUS AQUEOUS PASTE OF WHICH THE SOLID MATERIAL CONSISTS ESSENTIALLY OF 200 TO 400 MESH ALUMINA OF AT LEAST 99 PER CENT PURITY COMPRISING 70 TO 90 WEIGHT PER CENT ALPHA CORUNDUM AND 5 OT 30 WEIGHT PER CENT HYDRATED ALUMINA, DRYING THE SPHERES, AND CALCINING THE DRIED SPHERES AT A TEMPERATURE IN THE RANGE OF 3000 TO 3150* F. FOR A TIME IN THE RANGE OF 1 TO 30 HOURS.
Claim 2
Dependent Claim
87 words
A PROCESS FOR MANUFACTURING HEAT AND SHOCK RESISTANT ALUMINA PEBBLES WHICH COMPRISES COMPACTING SPHERES FROM A HOMOGENEOUS AQUEOUS PASTE OF WHICH THE SOLID MATERIAL CONSISTS ESSENTIALLY OF 200 TO 400 MESH ALUMINA OF AT LEAST 99 PER CENT PURITY COMPRISING 70 TO 90 WEIGHT PER CENT ALPHA CORUNDUM AND 5 OT 30 WEIGHT PER CENT HYDRATED ALUMINA, DRYING THE SPHERES, AND CALCINING THE DRIED SPHERES AT A TEMPERATURE IN THE RANGE OF 3000 TO 3150* F. FOR A TIME IN THE RANGE OF 1 TO 30 HOURS.
References Cited (Backward Citations)
US1662739A
Cited
US2447306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |