US3532640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite suspension for the conducting inner layer of cathode ray tubes
Assignee: US Philips Corp
•
Filing: 1967-09-19
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Granted: 1970-10-06
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Expires: 1987-09-19
Abstract
No abstract record available.
Inventors
- 👤 Erich Scharrer
- 👤 Gunter Kossow
- 👤 Gunter Plura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:25
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/88; C; C01; C01B; C01B32/00; C03; C03C; C03C17/00; C03C17/22; H01B; H01B1/00; H01B1/14; H01B1/18; C03C2217/00; C03C2217/20; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/11
Claims Analysis
Total Claims: 0
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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) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |