US2856269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying induction lamp target
Assignee: GTE Sylvania Inc
•
Filing: 1956-02-28
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Granted: 1958-10-14
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Laurie H Sabine
- 👤 Selwyn L Willey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; H; H01; H01K; H01K3/00; H01K3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE PROCESS OF PURIFYING A METAL CARBIDE TARGET WHICH COMPRISES: HEATING SAID TARGET IN AN ATMOSPHERE OF HYDROCARBON AT A TEMPERATURE BELOW ITS MELTING POINT BUT ABOVE THE TEMPERATURE AT WHICH SMOKE IS EVOLVED FROM SAID TARGET, AND THEREAFTER HEATING SAID TARGET AT A TEMPERATURE BETWEEN 3400*K. AND 3700*K. IN AN INERT ATMOSPHERE AT LOW PRESSURE.
Claim 2
Dependent Claim
56 words
THE PROCESS OF PURIFYING A METAL CARBIDE TARGET WHICH COMPRISES: HEATING SAID TARGET IN AN ATMOSPHERE OF HYDROCARBON AT A TEMPERATURE BELOW ITS MELTING POINT BUT ABOVE THE TEMPERATURE AT WHICH SMOKE IS EVOLVED FROM SAID TARGET, AND THEREAFTER HEATING SAID TARGET AT A TEMPERATURE BETWEEN 3400*K. AND 3700*K. IN AN INERT ATMOSPHERE AT LOW PRESSURE.
References Cited (Backward Citations)
US1909680A
Cited
GB573564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |