US2671408A
Expired / Lapsed
US
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Assignee: TDK Micronas GmbH
•
Filing: 1947-03-10
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Granted: 1954-03-09
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Expires: 1967-03-10
Abstract
No abstract record available.
Inventors
- 👤 Morton A Kreitchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:07
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2233; D; D06; D06F; D06F39/00; D06F39/08; D06F39/083; D06F39/085; F04D29/08; F04D29/10; F04D29/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1764706A
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US2021346A
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US2027505A
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GB497287A
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US2258371A
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US2245866A
Cited
US2439315A
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US2408909A
Cited
US2436996A
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US2460952A
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US2502915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |