Patent US2947890A successfully refreshed from Google Patents.
US2947890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: Harris Transducer Corp
•
Filing: 1957-03-25
•
Granted: 1960-08-02
•
Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Harris
- 👤 Philip B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:34
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1877254A
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US1997193A
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US2116522A
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US2057503A
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US2085092A
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US2293951A
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US2423869A
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US2387943A
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US2551711A
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US2423345A
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US2391678A
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US2818514A
Cited
US2830267A
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US2890354A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |