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US2831989A
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Assignee: QUARTZ ET ELECTRONIQUE
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Filing: 1955-02-17
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Granted: 1958-04-22
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Expires: 1975-02-17
Abstract
No abstract record available.
Inventors
- 👤 Ianouchevsky Wladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:50
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1766036A
Cited
US2081862A
Cited
US2074171A
Cited
US2295845A
Cited
US2494919A
Cited
US2697579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |