US2596638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic variometer
Assignee: Individual
•
Filing: 1948-05-17
•
Granted: 1952-05-13
•
Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Arvela Aukusti Jeremias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:15
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/038
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1976636A
Cited
US1943850A
Cited
US1951716A
Cited
US1909619A
Cited
US2151627A
Cited
US2416344A
Cited
US2436039A
Cited
US2487047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |