US2456342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining the approximate amount of oil eilm on an article
Assignee: Tennessee Coal Iron and Railroad Co
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Filing: 1947-05-20
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Granted: 1948-12-14
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Expires: 1967-05-20
Abstract
No abstract record available.
Inventors
- 👤 Paul F Trevor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803; G01N35/00; G01N35/10; G01N2035/1027; G01N2035/1034; G01N2035/1037
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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |