US2974369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making display amplifier
Assignee: TDK Micronas GmbH
•
Filing: 1953-06-17
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Granted: 1961-03-14
•
Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Richard K Orthuber
- 👤 Cyril L Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:34
CPC Classifications
H; H10; H10F; H10F55/00; H10F55/10; Y; Y10; Y10S; Y10S264/00; Y10S264/45; Y10S264/72; Y10S425/00; Y10S425/033; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB188030A
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US1935649A
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US1854071A
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US2233941A
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US2169840A
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US2238381A
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US2189340A
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US2262123A
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US2434931A
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US2548872A
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US2650191A
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US2650310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |