US3403269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency responsive rc timing circuit for detecting either lack of input or overextended presence of input
Assignee: TECHRAND CORP OF AMERICA
•
Filing: 1966-04-25
•
Granted: 1968-09-24
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert C Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:57
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/19; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3068367A
Cited
US3033994A
Cited
US3138759A
Cited
US3093756A
Cited
US3305732A
Cited
US3264496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |