US2446514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbon mixtures
Assignee: Shell Development Co
•
Filing: 1944-09-16
•
Granted: 1948-08-03
•
Expires: 1964-09-16
Abstract
No abstract record available.
Inventors
- 👤 Stewart Hall
- 👤 August A Schaerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:09
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669151A
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US1951780A
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US1980649A
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GB441104A
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US2198576A
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US2108629A
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US2164013A
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US2193767A
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US2161569A
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US2180763A
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US2246982A
Cited
US2234916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |