US3051879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable impedance device
Assignee: Corning Glass Works
•
Filing: 1961-01-23
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Granted: 1962-08-28
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Lazar Nicholas
- 👤 Keith S Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/041; H01F21/00; H01F21/02; H01F21/10; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18752
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2922093A
Cited
US2930952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |