Patent US1692756A successfully refreshed from Google Patents.
US1692756A
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Desulphurizing hydrocarbon oils
Assignee: Vacuum Oil Co
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Filing: 1927-01-18
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Granted: 1928-11-20
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Expires: 1947-01-18
Abstract
No abstract record available.
Inventors
- 👤 Robert C Moran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:41
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/02; C10G29/04; C10L; C10L9/00; C10L9/02
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) | 1931-11-20 | 1932-05-21 | 1932-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-20 | 1936-05-21 | 1936-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-20 | 1940-05-21 | 1940-11-20 | $7700.00 | Window Closed / Lapsed |