Patent US3546498A successfully refreshed from Google Patents.
US3546498A
Expired / Lapsed
US
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Curved sonic transmission line
Assignee: Ohio University
•
Filing: 1969-06-13
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Granted: 1970-12-08
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Expires: 1989-06-13
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcmaster
- 👤 Charles C Libby
- 👤 Hildegard M Minchenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1799634A
Cited
US2514080A
Cited
US2503831A
Cited
US3176788A
Cited
US3173034A
Cited
US3273146A
Cited
US3350582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |