US2899276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing dense
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:48
CPC Classifications
C; C01; C01F; C01F3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
PROCESS FOR THE DIRECT PREPARATION OF DENSE, FILTERABLE, CRYSTALLINE BERYLLIUM HYDROXIDE BY NEUTRALIZING A SOLUTION OF A BERYLLIUM SALT BY MEANS OF A BASE, COMPRISING THE STEPS OF: SIMULTANEOUSLY INTRODUCING THE BERYLLIUM SALT SOLUTION AND THE BASE INTO A REACTION ZONE; MAINTAINING THE TEMPERATURE IN THE REACTION ZONE CLOSE TO THE BOILING POINT OF THE SOLUTION; MAINTAININING THE PH IN THE REACTION ZONE IN THE RANGE BETWEEN 6 AND 8.5, AND THEREBY OBTAINING A PRECIPITATE OF STABLE, GRANULAR CRYSTALLINE BERYLLIUM HYDROXIDE, AND RECOVERING SAID PRECIPITATE.
Claim 2
Dependent Claim
85 words
PROCESS FOR THE DIRECT PREPARATION OF DENSE, FILTERABLE, CRYSTALLINE BERYLLIUM HYDROXIDE BY NEUTRALIZING A SOLUTION OF A BERYLLIUM SALT BY MEANS OF A BASE, COMPRISING THE STEPS OF: SIMULTANEOUSLY INTRODUCING THE BERYLLIUM SALT SOLUTION AND THE BASE INTO A REACTION ZONE; MAINTAINING THE TEMPERATURE IN THE REACTION ZONE CLOSE TO THE BOILING POINT OF THE SOLUTION; MAINTAININING THE PH IN THE REACTION ZONE IN THE RANGE BETWEEN 6 AND 8.5, AND THEREBY OBTAINING A PRECIPITATE OF STABLE, GRANULAR CRYSTALLINE BERYLLIUM HYDROXIDE, AND RECOVERING SAID PRECIPITATE.
References Cited (Backward Citations)
US1559703A
Cited
US1797994A
Cited
US2415074A
Cited
US2656266A
Cited
US2657115A
Cited
US2738255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |