US3406782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical impedance transformer for coupling sonic energy to the earth
Assignee: Individual
•
Filing: 1966-11-07
•
Granted: 1968-10-22
•
Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Albert G Bodine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G01; G01V; G01V1/00; G01V1/02; G01V1/04; G01V1/047; G01V1/143; G01V1/153; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2745507A
Cited
US3122664A
Cited
US2960314A
Cited
US3282372A
Cited
US3280938A
Cited
US3296589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |