US2844769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-conductor electrode systems
Assignee: US Philips Corp
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Filing: 1954-11-19
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Granted: 1958-07-22
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Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
- 👤 Erkelens Johannes
- 👤 Kamerman Jan
- 👤 Roovers Wilhelmus Antonius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:28
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/161; H10W72/00; H10W76/40
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |