Patent US3009060A successfully refreshed from Google Patents.
US3009060A
Expired / Lapsed
US
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Gas chromatography
Assignee: National Research Corp
•
Filing: 1956-09-10
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Granted: 1961-11-14
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Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Jonathan R Roehrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:01
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; G01N30/00; G01N30/02; G01N30/86; G01N30/8603; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186; G06G7/1865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899555A
Cited
US2613326A
Cited
US2765409A
Cited
US2641710A
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US2761976A
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US2742574A
Cited
US2688097A
Cited
GB737386A
Cited
US2740894A
Cited
US2702898A
Cited
US2876360A
Cited
US2817764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |