US2989651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor pulse generator
Assignee: AT&T Inc
•
Filing: 1957-12-31
•
Granted: 1961-06-20
•
Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Larrabee M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:31
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2772357A
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US2772370A
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US2798169A
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US2915710A
Cited
US2873371A
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US2857518A
Cited
US2848613A
Cited
US2882482A
Cited
US2877360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |