US3928244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive refractory body
Assignee: GTE Sylvania Inc
•
Filing: 1973-11-01
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Granted: 1975-12-23
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Expires: 1993-11-01
Abstract
Abstract An electrically conductive refractory body suitable for use as a boat for the evaporation of metals consists essentially of TiB2, BN and TiH2. AlN may be optionally included.
Inventors
- 👤 Edmund M Passmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
H; H01; H01B; H01B1/00; C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AN ELECTRICALLY CONDUCTIVE REFRACTORY BOAT, FOR THE VACUUM DEPOSITION OF METALS, CONSISTING ESSENTIALLY OF TIB2, BN AND TIH2, WHEREIN SAID BOAT HAS THE FOLLOWING COMPOSITION: 5 TO 65 VOLUME PERCENT OF BN, 20 TO 50 VOLUME PERCENT OF TIB2, 1 TO 5 VOLUME PERCENT OF TIH2, 0 TO 30 VOLUME PERCENT OF ANLN.
Claim 2
Dependent Claim
53 words
AN ELECTRICALLY CONDUCTIVE REFRACTORY BOAT, FOR THE VACUUM DEPOSITION OF METALS, CONSISTING ESSENTIALLY OF TIB2, BN AND TIH2, WHEREIN SAID BOAT HAS THE FOLLOWING COMPOSITION: 5 TO 65 VOLUME PERCENT OF BN, 20 TO 50 VOLUME PERCENT OF TIB2, 1 TO 5 VOLUME PERCENT OF TIH2, 0 TO 30 VOLUME PERCENT OF ANLN.
References Cited (Backward Citations)
US3544486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |