US2448272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separation of vapors from a contact mass
Assignee: ExxonMobil Oil Corp
•
Filing: 1943-08-11
•
Granted: 1948-08-31
•
Expires: 1963-08-11
Abstract
No abstract record available.
Inventors
- 👤 John W Payne
- 👤 Charles V Hornberg
- 👤 Robert D Drew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:58
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2342156A
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US2356697A
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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) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |