US3418509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge character indicator tube
Assignee: US Philips Corp
•
Filing: 1966-06-08
•
Granted: 1968-12-24
•
Expires: 1986-06-08
Abstract
No abstract record available.
Inventors
- 👤 Frouws Simon Mari
- 👤 Kerr George
- 👤 Hendriks Adrianus Anthon Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2500929A
Cited
GB712174A
Cited
US2933648A
Cited
US3260880A
Cited
US3231776A
Cited
US3312852A
Cited
US3327153A
Cited
US3334269A
Cited
US3327154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |