US3414725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the determination of opacity to radiation per unit of thickness of objects
Assignee: Marathon Oil Co
•
Filing: 1964-12-21
•
Granted: 1968-12-03
•
Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Hilton B Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01N23/00; G01N23/02; G01N23/06; G01N23/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2812685A
Cited
US2922887A
Cited
GB847129A
Cited
US3066254A
Cited
US3080479A
Cited
US3136892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |