US2335117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic surveying apparatus
Assignee: Hughes Henry and Son Ltd
•
Filing: 1940-07-23
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Granted: 1943-11-23
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Expires: 1960-07-23
Abstract
No abstract record available.
Inventors
- 👤 Harrison Edward Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/022; Y; Y10; Y10S; Y10S106/00; Y10S106/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-11-22 | 1947-05-24 | 1947-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-22 | 1951-05-24 | 1951-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-22 | 1955-05-24 | 1955-11-23 | $7700.00 | Window Closed / Lapsed |