US3387966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry process for controlled surface oxidation of beryllium powders
Assignee: Beryllium Corp
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Filing: 1964-08-13
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Granted: 1968-06-11
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Simon J Morana
- 👤 Walter J Koshuba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:31
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C8/12; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR PRODUCING SUB-SIEVE BERYLLIUM METAL POWDERS CONTAINING A PREDETERMINED AMOUNT, UP TO ABOUT 5 PERCENT BERYLLIUM OXIDE, COMPRISING HEATING SAID POWDERS IN THE PRESENCE OF AN OXYGEN CONTAINING GAS AT TEMPERATURES OF FROM 140* TO 400*C., SAID AMOUNT OF BERYLLIUM OXIDE BEING DIRECTLY PROPORTIONAL TO THE INCREASE IN TEMPERATURE.
Claim 2
Dependent Claim
51 words
A PROCESS FOR PRODUCING SUB-SIEVE BERYLLIUM METAL POWDERS CONTAINING A PREDETERMINED AMOUNT, UP TO ABOUT 5 PERCENT BERYLLIUM OXIDE, COMPRISING HEATING SAID POWDERS IN THE PRESENCE OF AN OXYGEN CONTAINING GAS AT TEMPERATURES OF FROM 140* TO 400*C., SAID AMOUNT OF BERYLLIUM OXIDE BEING DIRECTLY PROPORTIONAL TO THE INCREASE IN TEMPERATURE.
References Cited (Backward Citations)
US3181947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |