US3476956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bilateral transistor gate circuit
Assignee: AT&T Inc
•
Filing: 1966-02-11
•
Granted: 1969-11-04
•
Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Paul N Burgess
- 👤 Robert E Cardwell
- 👤 Frank R Remski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2728857A
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US2891171A
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US3064142A
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US2972685A
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US3025418A
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US3215858A
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US3289086A
Cited
US3315094A
Cited
US3289013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |