US2444175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ammonia and hydrocarbons from mixtures containing ammonia, propane, propylene, and higher boiling materials
Assignee: Sinclair Refining Co
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Filing: 1944-10-12
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Granted: 1948-06-29
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Expires: 1964-10-12
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
- 👤 Smith Reading Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C01; C01C; C01C1/00; C01C1/02; C01C1/12; Y; Y10; Y10S; Y10S203/00; Y10S203/03; Y10S62/00; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973474A
Cited
US1866800A
Cited
GB422139A
Cited
US2080064A
Cited
US2370063A
Cited
US2395057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |