US2237193A
Expired / Lapsed
US
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Detection of objects by electromagnetic rays
Assignee: RALPH CHIVAS GULLY SLAZENGER
•
Filing: 1938-03-31
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Granted: 1941-04-01
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Expires: 1958-03-31
Abstract
No abstract record available.
Inventors
- 👤 Mobsby Eric George Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/06; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/28; G01S7/282; Y; Y10; Y10S; Y10S246/00; Y10S246/01
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) | 1944-03-31 | 1944-09-30 | 1945-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-31 | 1948-09-30 | 1949-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-31 | 1952-09-30 | 1953-04-01 | $7700.00 | Window Closed / Lapsed |