Patent US2131806A successfully refreshed from Google Patents.
US2131806A
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Treatment of hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1935-08-16
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Granted: 1938-10-04
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Expires: 1955-08-16
Abstract
No abstract record available.
Inventors
- 👤 Ipatieff Vladimir
- 👤 Komarewsky Vasili
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:23
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/74; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
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) | 1941-10-03 | 1942-04-04 | 1942-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-03 | 1946-04-04 | 1946-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-03 | 1950-04-04 | 1950-10-04 | $7700.00 | Window Closed / Lapsed |