US2473581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating instrument with magnetic
Assignee: —
•
Filing: —
•
Granted: 1949-06-21
•
Expires: 1966-06-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/38; G01F23/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398802A
Cited
US1169761A
Cited
US1141500A
Cited
GB169307A
Cited
US1441279A
Cited
US1945400A
Cited
CH184922A
Cited
US2264485A
Cited
US2320023A
Cited
US2350533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |