US2552970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic generator
Assignee: SONIC RES CORP
•
Filing: 1949-10-22
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Granted: 1951-05-15
•
Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 Caperton B Horsley
- 👤 Gordon C Seavey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:29
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/04
Claims Analysis
Total Claims: 0
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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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |