US3551837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave transducers with side lobe suppression
Assignee: United States Department of the Navy
•
Filing: 1969-08-13
•
Granted: 1970-12-29
•
Expires: 1989-08-13
Abstract
No abstract record available.
Inventors
- 👤 Jeffrey M Speiser
- 👤 Harper John Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
H; H03; H03F; H03F13/00; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/145; H03H9/14544; H03H9/1455; H03H9/46; H03H9/64; H03H9/6406; H03H9/6489; H03H9/6493; Y; Y10; Y10S; Y10S367/00; Y10S367/905
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |