US2842959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic wave train generator
Assignee: Sperry Products Inc
•
Filing: 1954-11-01
•
Granted: 1958-07-15
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Elliott A Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:06
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0215; B06B2201/00; B06B2201/50; B06B2201/55; B06B2201/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1817030A
Cited
US2398701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |