US3025137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sintered compacts of beryllia
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1959-05-27
•
Granted: 1962-03-13
•
Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 Murray Peter
- 👤 Livey David Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
PROCESS OF PRODUCING A SINTERED COMPACT OF PURE BERYLLIA WHICH COMPRISES COLD-COMPACTING A SUBSTANTIALLY PURE BERYLLIA POWDER PRODUCED BY CALCINING PURE BERYLLIUM HYDROXIDE AT 900*C., HEATING THE COLD COMPACTED POWDER FOR AT LEAST 40 HOURS AT TEMPERATURES BETWEEN 1100*C., AND 1400*C., AND THEN HEATING TO A SINTERING TEMPERATURE OF AT LEAST 1500*C.
Claim 2
Dependent Claim
52 words
PROCESS OF PRODUCING A SINTERED COMPACT OF PURE BERYLLIA WHICH COMPRISES COLD-COMPACTING A SUBSTANTIALLY PURE BERYLLIA POWDER PRODUCED BY CALCINING PURE BERYLLIUM HYDROXIDE AT 900*C., HEATING THE COLD COMPACTED POWDER FOR AT LEAST 40 HOURS AT TEMPERATURES BETWEEN 1100*C., AND 1400*C., AND THEN HEATING TO A SINTERING TEMPERATURE OF AT LEAST 1500*C.
References Cited (Backward Citations)
US2818605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |