US2021740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hydrocarbon oils
Assignee: Universal Oil Products Co
•
Filing: 1931-07-17
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Granted: 1935-11-19
•
Expires: 1951-07-17
Abstract
No abstract record available.
Inventors
- 👤 Egloff Gustav
- 👤 Jacque C Morrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:30
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/02; C10G17/00; C10G17/095; C10G29/00; C10G29/06; C10G29/12
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) | 1938-11-18 | 1939-05-20 | 1939-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-18 | 1943-05-20 | 1943-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-18 | 1947-05-20 | 1947-11-19 | $7700.00 | Window Closed / Lapsed |