US3514324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten coating of dispenser cathode
Assignee: Kopco Industries
•
Filing: 1967-05-01
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Granted: 1970-05-26
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Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Otto G Koppius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:16
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J23/05; C; C23; C23C; C23C16/00; C23C16/06; C23C16/16; C23C18/00; C23C18/02; C23C18/08; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290913A
Cited
US2700000A
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US2820920A
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US3041209A
Cited
US2874077A
Cited
US3023491A
Cited
US3155532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |