Patent US3405387A successfully refreshed from Google Patents.
US3405387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical underwater control apparatus
Assignee: Lockheed Martin Corp
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Filing: 1965-10-24
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Granted: 1968-10-08
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Paul C Koomey
- 👤 Alan J Streb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/0085; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/0355; G; G08; G08C; G08C23/00; G08C23/02; E21B34/00; E21B34/02; E21B34/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |