US3666411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of alumina hydrate
Assignee: Individual
•
Filing: 1969-09-24
•
Granted: 1972-05-30
•
Expires: 1989-09-24
Abstract
Abstract PREPARATION OF PARTICULATE HYDRATED ALUMINA BY COMMINGLING PARTICLES OF METALLIC ALUMINUM AND AN AQUEOUS SOLUTION OF AN ALKALI METAL CYANIDE, TETRABORATE OF HYDROCIDE AT A REACTING TEMPERATURE, THE RATIO OF GRAM MOLES OF ELECTROLYTO TO GRAM ATOMS OF ALUMINUS BEING BETWEEN ABOUT 0.1 TO 1 AND 1 TO 1. THE RESULTING PRODUCTS HAVE AN APPARENT BULK DENSITY OF 0.2 TO 0.5 GRAM/CC.
Inventors
- 👤 Carroll Wayne Collier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:26
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/061; C01B3/08; C01B3/10; C01P; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/17; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |