Patent US3515911A successfully refreshed from Google Patents.
US3515911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave transducer
Assignee: United States Department of the Navy
•
Filing: 1968-10-28
•
Granted: 1970-06-02
•
Expires: 1988-10-28
Abstract
No abstract record available.
Inventors
- 👤 George W Byram
- 👤 Harper John Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:04
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/145; H03H9/14502
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3004424A
Cited
US2921134A
Cited
US3246164A
Cited
US3243648A
Cited
US3353120A
Cited
US3360749A
Cited
US3399314A
Cited
US3412269A
Cited
US3453456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |