US2445328A
Expired / Lapsed
US
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Conversion process for heavy hydrocarbons
Assignee: Hydrocarbon Research Inc
•
Filing: 1945-03-09
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Granted: 1948-07-20
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Percival C Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:07
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/28; C10G9/32; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/38; B01J8/384; B01J8/386; Y; Y10; Y10S; Y10S48/00; Y10S48/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687118A
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US1984380A
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US2154820A
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US2231231A
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US2339932A
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US2358039A
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US2378342A
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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) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |