US3406358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic surface waveguides
Assignee: AT&T Inc
•
Filing: 1967-10-30
•
Granted: 1968-10-15
•
Expires: 1987-10-30
Abstract
No abstract record available.
Inventors
- 👤 Scidel Harold
- 👤 Donald L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/36; G10K11/18; G10K11/24; H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; H03; H03H; H03H9/00; H03H9/02; H03H9/02535; H03H9/02818; H03H9/02881; H03H9/30; H03H9/36; H03H9/46; H03H7/00; H03H7/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3289114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |