US2452569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating hydrocarbons in presence of hot contact masses
Assignee: Houdry Process Corp
•
Filing: 1946-09-10
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Granted: 1948-11-02
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Expires: 1966-09-10
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:27
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0492; B01J8/0403; B01J8/0423; B01J8/0438; B01J8/0446; B01J8/0449; B01J8/0453; B01J2219/00; B01J2219/18; B01J2219/182; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91
Claims Analysis
Total Claims: 0
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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) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |