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US1957649A
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Process and apparatus for the treatment of soda-treated tars and other residues of the petroleum industry with a view to the conversion thereof into light products
Assignee: Houdry Process Corp
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Filing: 1931-02-16
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Granted: 1934-05-08
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Expires: 1951-02-16
Abstract
No abstract record available.
Inventors
- 👤 Houdry Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
C; C10; C10G; C10G11/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0461; B01J8/0473; B01J8/0492; C10G11/10; B01J2208/00; B01J2208/00796; B01J2208/00823; B01J2208/00831; B01J2208/00849; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
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) | 1937-05-07 | 1937-11-06 | 1938-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-07 | 1941-11-06 | 1942-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-07 | 1945-11-06 | 1946-05-08 | $7700.00 | Window Closed / Lapsed |