US2448549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for catalytic conversion of hydrocarbon vapors
Assignee: Lummus Technology LLC
•
Filing: 1941-01-29
•
Granted: 1948-09-07
•
Expires: 1961-01-29
Abstract
No abstract record available.
Inventors
- 👤 Carl S Reed
- 👤 Schutte August Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE533037C
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US2231424A
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US2231231A
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US2224014A
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US2253486A
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US2304827A
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US2273075A
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US2302209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |