US2444290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth induction compass
Assignee: Svenska AB Gasaccumulator
•
Filing: 1943-11-27
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Granted: 1948-06-29
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Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Granqvist Carl-Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01C17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21156E
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US1886336A
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US2025897A
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US2049232A
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US2038787A
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US2201559A
Cited
US2206018A
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US2240680A
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US2334469A
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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) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |