US3403271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer with absorptive load
Assignee: HP Inc
•
Filing: 1966-02-09
•
Granted: 1968-09-24
•
Expires: 1986-02-09
Abstract
No abstract record available.
Inventors
- 👤 Donn D Lobdell
- 👤 Edward H Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0681; B06B1/0685
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2430013A
Cited
US2415832A
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US2649550A
Cited
US2700738A
Cited
US2822539A
Cited
US2984756A
Cited
US2972068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |