US2227377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing lubricating oils
Assignee: Mid Continent Petroleum Corp
•
Filing: 1938-09-23
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Granted: 1940-12-31
•
Expires: 1958-09-23
Abstract
No abstract record available.
Inventors
- 👤 Dwight B Mapes
- 👤 Eddie M Dons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:04
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/14; C10G17/00; C10G17/02; C10G17/04; C10G17/06; C10G21/003
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |