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Patent US3449598A successfully refreshed from Google Patents.
US3449598A
Expired / Lapsed
US
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Transistor circuits
Assignee: ZF International UK Ltd
•
Filing: 1965-10-04
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Granted: 1969-06-10
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Maurice James Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/08; H03K17/082; H03K17/0826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3058034A
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US2915693A
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US3074006A
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US2932783A
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US3176163A
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US3237082A
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US3303387A
Cited
US3327201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |