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Patent US3397353A successfully refreshed from Google Patents.
US3397353A
Expired / Lapsed
US
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Modulators using field-effect transistors
Assignee: Leeds and Northrup Co
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Filing: 1966-03-31
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Granted: 1968-08-13
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Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 James J Hitt
- 👤 Mosley Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:12
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/542; H03C1/547; H03F; H03F3/00; H03F3/38; H03F3/387; H03F3/393
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3034074A
Cited
US3201689A
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US3202922A
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US3229190A
Cited
US3287620A
Cited
US3309527A
Cited
GB1016975A
Cited
US3281718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |