US3277404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic delay device
Assignee: AT&T Inc
•
Filing: 1963-08-23
•
Granted: 1966-10-04
•
Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Everett L Fabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:12
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/13; H03K5/14; H03K5/01; H03K5/04; H03K5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA686737A
Cited
US2485722A
Cited
US3041556A
Cited
US2982926A
Cited
US3133258A
Cited
US3155926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |