US2572157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination radio-wire recorder
Assignee: AIR KING PRODUCTS Co Inc
•
Filing: 1947-12-31
•
Granted: 1951-10-23
•
Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Leopold M Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/10; H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |