Patent US2998723A successfully refreshed from Google Patents.
US2998723A
Expired / Lapsed
US
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Sonic wave conductor
Assignee: ACOUSTICA ASSOCIATES Inc
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Filing: 1956-06-15
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Granted: 1961-09-05
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Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Preston W Smith
- 👤 Miguel C Junger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:34
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/24; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2962; Y; Y10; Y10S; Y10S116/00; Y10S116/18; Y10S367/00; Y10S367/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1788519A
Cited
US1936706A
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DE745196C
Cited
US2565725A
Cited
US2684724A
Cited
US2688732A
Cited
US2713263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |