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US2983901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal hydrophone
Assignee: Individual
•
Filing: 1945-04-16
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Granted: 1961-05-09
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Expires: 1965-04-16
Abstract
No abstract record available.
Inventors
- 👤 Le Roy C Paslay
- 👤 Charles B Brown
- 👤 Nelson N Estes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1216946A
Cited
GB168839A
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US1591068A
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US1380869A
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US2044807A
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US2088324A
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US2233992A
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FR852150A
Cited
US2405226A
Cited
US2626380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |