Patent US2847853A successfully refreshed from Google Patents.
US2847853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring apparatus employing ultrasonic waves
Assignee: Kelvin Hughes Ltd
•
Filing: 1954-06-11
•
Granted: 1958-08-19
•
Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Alexander B C Rankin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:51
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2487; G01N2291/00; G01N2291/04; G01N2291/042; G01N2291/0422; G01N2291/0423; G01N2291/0426
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |