US2439348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for conversion of hydrocarbons
Assignee: ExxonMobil Oil Corp
•
Filing: 1943-09-21
•
Granted: 1948-04-06
•
Expires: 1963-09-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Simpson
- 👤 Lee Russell
- 👤 Frederick E Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:18
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01J8/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2302328A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |