US2958788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor delay circuits
Assignee: AT&T Inc
•
Filing: 1956-06-11
•
Granted: 1960-11-01
•
Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 John A Githens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/13; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K5/01; H03K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2421340A
Cited
US2437313A
Cited
US2572080A
Cited
FR1081207A
Cited
US2905815A
Cited
FR1114488A
Cited
US2871378A
Cited
US2846594A
Cited
US2845548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |