US2238864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing equipment
Assignee: ExxonMobil Oil Corp
•
Filing: 1939-09-15
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Granted: 1941-04-15
•
Expires: 1959-09-15
Abstract
No abstract record available.
Inventors
- 👤 Malcolm F Pratt
- 👤 Carleton H Schlesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00085; B01J2219/0015; B01J2219/00155; B01J2219/00164; B01J2219/18; B01J2219/185
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) | 1944-04-14 | 1944-10-14 | 1945-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-14 | 1948-10-14 | 1949-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-14 | 1952-10-14 | 1953-04-15 | $7700.00 | Window Closed / Lapsed |