Patent US3386453A successfully refreshed from Google Patents.
Patent US2874349A successfully refreshed from Google Patents.
US2874349A
Expired / Lapsed
US
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Apparatus for detecting and measuring the depth of reinforcing rods
Assignee: Individual
•
Filing: 1955-06-02
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Granted: 1959-02-17
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Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 Henry N Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |