Patent US1990701A successfully refreshed from Google Patents.
Patent US2584571A successfully refreshed from Google Patents.
US2584571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetometer
Assignee: ROBERT H RAY CO
•
Filing: 1948-02-24
•
Granted: 1952-02-05
•
Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 Frowe Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:53
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/028; G01R33/0283
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2124825A
Cited
US2151627A
Cited
US2406870A
Cited
US2420580A
Cited
US2468554A
Cited
US2468968A
Cited
US2451819A
Cited
US2421583A
Cited
US2447849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |