US2609533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring system
Assignee: Individual
•
Filing: 1945-03-22
•
Granted: 1952-09-02
•
Expires: 1965-03-22
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S13/785; G01S13/788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1924174A
Cited
US2089639A
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US2266401A
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GB528192A
Cited
US2361437A
Cited
US2422074A
Cited
US2538027A
Cited
US2531412A
Cited
US2433667A
Cited
US2415359A
Cited
US2483594A
Cited
US2516356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |