Patent US2943933A successfully refreshed from Google Patents.
US2943933A
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Method and apparatus for making isotropic propertied beryllium sheet
Assignee: Beryllium Corp
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Filing: 1959-05-21
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Granted: 1960-07-05
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Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert E Lenhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:39
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; B22F3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING ISOTROPIC PROPERTIED BERYLLIUM SHEETS WHICH COMPRISES THE STEPS OF CONFINING POWDERED BERYLLIUM METAL IN AN ENVELOPE, PLACING SUCH ENVELOPE ON A DIE PLATE, LOCATING AN EXPLOSIVE CHARGE IN FIXED PREDETERMINED DISTANCE ABOVE SAID ENVELOPE AND DIE PLATE, LOWERING THE DIE PLATE, ENVELOPE AND EXPLOSIVE CHARGE BENEATH THE SURFACE OF A BODY OF WATER, THEN DETONATING THE EXPLOSIVE CHARGE TO EFFECT COMPACTION OF THE POWDERED BERYLLIUM METAL WITHIN THE ENVELOPE, AND SINTERING SAID THUS COMPACTED POWDERED BERYLLIUM METAL WHILE STILL IN SAID ENVELOPE, SAID SINTERING CARRIED OUT AT A TEMPERATURE OF FROM 800 TO 1000*C. FOR APPROXIMATELY TWO HOURS, STRIPPING THE ENVELOPE FROM THE SINTERED AND COMPACTED POWDERED BERYLLIUM AND SUBJECTING THE THUS DEJACKETED SHEET TO A FURTHER SINTERING AT A TEMPERATURE OF FROM 1000 TO 1200*C. FOR APPROXIMATELY TWO HOURS.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING ISOTROPIC PROPERTIED BERYLLIUM SHEETS WHICH COMPRISES THE STEPS OF CONFINING POWDERED BERYLLIUM METAL IN AN ENVELOPE, PLACING SUCH ENVELOPE ON A DIE PLATE, LOCATING AN EXPLOSIVE CHARGE IN FIXED PREDETERMINED DISTANCE ABOVE SAID ENVELOPE AND DIE PLATE, LOWERING THE DIE PLATE, ENVELOPE AND EXPLOSIVE CHARGE BENEATH THE SURFACE OF A BODY OF WATER, THEN DETONATING THE EXPLOSIVE CHARGE TO EFFECT COMPACTION OF THE POWDERED BERYLLIUM METAL WITHIN THE ENVELOPE, AND SINTERING SAID THUS COMPACTED POWDERED BERYLLIUM METAL WHILE STILL IN SAID ENVELOPE, SAID SINTERING CARRIED OUT AT A TEMPERATURE OF FROM 800 TO 1000*C. FOR APPROXIMATELY TWO HOURS, STRIPPING THE ENVELOPE FROM THE SINTERED AND COMPACTED POWDERED BERYLLIUM AND SUBJECTING THE THUS DEJACKETED SHEET TO A FURTHER SINTERING AT A TEMPERATURE OF FROM 1000 TO 1200*C. FOR APPROXIMATELY TWO HOURS.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |