US2541072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Farnsworth Research Corp
•
Filing: 1942-01-03
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Granted: 1951-02-13
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Expires: 1962-01-03
Abstract
No abstract record available.
Inventors
- 👤 Townsend S Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:27
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/12; G11B17/16; G11B17/162; G11B17/165; G11B17/02; G11B17/022; G11B17/028; G11B17/0281
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |