Patent US2187631A successfully refreshed from Google Patents.
US2187631A
Expired / Lapsed
US
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Method of refining hydrocarbons
Assignee: American Locomotive Co
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Filing: 1937-06-25
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Granted: 1940-01-16
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Expires: 1957-06-25
Abstract
No abstract record available.
Inventors
- 👤 Hermann C Schutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
C; C10; C10G; C10G7/00; B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; B01D3/34; B01D3/38; C10G70/00; C10G70/04; C10G70/043; C10G9/00; C10G2400/00; C10G2400/20; C10G2400/22; C10G2400/30
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) | 1943-01-15 | 1943-07-17 | 1944-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-15 | 1947-07-17 | 1948-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-15 | 1951-07-17 | 1952-01-16 | $7700.00 | Window Closed / Lapsed |