US2670211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record changer
Assignee: Philips North America LLC
•
Filing: 1947-01-08
•
Granted: 1954-02-23
•
Expires: 1967-01-08
Abstract
No abstract record available.
Inventors
- 👤 Freimann Frank
- 👤 Hart Carl
- 👤 Sr Arthur L Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/22; G11B17/26
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |