US2245952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewaxing hydrocarbon oil
Assignee: Texaco Inc
•
Filing: 1939-02-11
•
Granted: 1941-06-17
•
Expires: 1959-02-11
Abstract
No abstract record available.
Inventors
- 👤 Lawrenceville Robert H Aitken
- 👤 Jr Wynkoop Kiersted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/60; B01D33/68; B01D33/80; B01D33/82
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) | 1944-06-16 | 1944-12-16 | 1945-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-16 | 1948-12-16 | 1949-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-16 | 1952-12-16 | 1953-06-17 | $7700.00 | Window Closed / Lapsed |