US3394342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic object detection systems
Assignee: PHILIP HULME WALKER
•
Filing: 1965-09-13
•
Granted: 1968-07-23
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Walker Philip Hulme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:03
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/88; G01S15/93; G01S15/931; G01S1/00; G01S1/72; G08; G08B; G08B13/00; G08B13/16; G08B13/1609; G08B13/1618; G08B13/1627; G01S2015/937; G01S2015/939
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3031644A
Cited
US2982955A
Cited
US2985018A
Cited
US2974304A
Cited
US3149561A
Cited
US3192516A
Cited
US3283292A
Cited
US3234502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |