US2489334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysis
Assignee: Houdry Process Corp
•
Filing: 1946-07-13
•
Granted: 1949-11-29
•
Expires: 1966-07-13
Abstract
No abstract record available.
Inventors
- 👤 Hubert A Shabaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:51
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2324518A
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US2272301A
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US2270090A
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US2328756A
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US2381820A
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US2391482A
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US2339248A
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US2344911A
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US2375757A
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US2353552A
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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) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |