US2436008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signalling system for radioactive well logging
Assignee: Individual
•
Filing: 1943-01-19
•
Granted: 1948-02-17
•
Expires: 1963-01-19
Abstract
No abstract record available.
Inventors
- 👤 Krasnow Shelley
- 👤 Leon F Curtiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06; H; H01; H01J; H01J47/00; H01J47/02; H01J47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |