US2362270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity reducing
Assignee: Standard Oil Development Co
•
Filing: 1942-05-20
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Granted: 1944-11-07
•
Expires: 1962-05-20
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:38
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G9/00; C10G9/28; C10G9/32
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) | 1947-11-07 | 1948-05-08 | 1948-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-11-07 | 1952-05-08 | 1952-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-11-07 | 1956-05-08 | 1956-11-07 | $7700.00 | Window Closed / Lapsed |