US3453456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1966-10-27
•
Granted: 1969-07-01
•
Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Henry G Oltman Jr
- 👤 Irving Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3365590A
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US2787777A
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US2806155A
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US2861247A
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US3012211A
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US3252722A
Cited
US3240962A
Cited
US3292018A
Cited
US3371264A
Cited
US3389274A
Cited
US3321647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |