US2126503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of refining mineral oils
Assignee: Shell Development Co
•
Filing: 1933-12-11
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Granted: 1938-08-09
•
Expires: 1953-12-11
Abstract
No abstract record available.
Inventors
- 👤 Edmond R P E Retailliau
- 👤 Joseph B Wyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G17/00; C10G17/095; C10G21/00; C10G21/06; C10G21/08
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) | 1941-08-08 | 1942-02-07 | 1942-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-08 | 1946-02-07 | 1946-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-08 | 1950-02-07 | 1950-08-09 | $7700.00 | Window Closed / Lapsed |