Patent US2441269A successfully refreshed from Google Patents.
US2441269A
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Electron discharge compass system
Assignee: Honeywell Inc
•
Filing: 1943-05-31
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Granted: 1948-05-11
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Expires: 1963-05-31
Abstract
No abstract record available.
Inventors
- 👤 Henry E Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:07
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01C17/32
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) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |