US3496533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional acoustic transmitting and receiving apparatus
Assignee: Schlumberger Technology Corp
•
Filing: 1968-09-06
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Granted: 1970-02-17
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Expires: 1988-09-06
Abstract
No abstract record available.
Inventors
- 👤 Adelbert Semmelink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/52; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622; Y; Y10; Y10S; Y10S367/00; Y10S367/911; Y10S367/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2868311A
Cited
US3138219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |