US3027690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic machine
Assignee: Sheffield Corp
•
Filing: 1958-11-20
•
Granted: 1962-04-03
•
Expires: 1978-11-20
Abstract
No abstract record available.
Inventors
- 👤 Richard N Roney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
B; B24; B24B; B24B1/00; B24B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR965199A
Cited
US2736144A
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US2580716A
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US2680333A
Cited
US2723386A
Cited
US2813377A
Cited
US2825186A
Cited
US2858652A
Cited
US2893271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |