Patent US825374A successfully refreshed from Google Patents.
Patent US3574550A successfully refreshed from Google Patents.
US3574550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means of identifying crude oil and other materials
Assignee: Sunoco Inc
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Filing: 1968-10-18
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Granted: 1971-04-13
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Expires: 1988-10-18
Abstract
Abstract A METHOD OF IDENTIFYING PETROLEUM COMPOUNDS BY ADDING THERETO MINUTE QUANTITIES OF METALLIC PHTHALOCYANINES, COMPLEXES OF ASPHALTENES AND METALS, OR MIXTURES OF SAME AND DETERMINING THE PRESENCE OF SAID ADDED COMPONENTS BY NEUTRON ACTIVATION.
Inventors
- 👤 Kenneth A Scott
- 👤 Roger M Bean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:54
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/02; G01N; G01N23/00; G01N23/22; G01N23/221; G01N23/222; G01N33/00; G01N33/26; G01N33/28; G01N33/2835; G01N33/2882; G01N2223/00; G01N2223/07; G01N2223/074; G01N2223/60; G01N2223/636; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T436/00; Y10T436/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |