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Patent US2476729A successfully refreshed from Google Patents.
US2476729A
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Catalytic oil cracking with air
Assignee: Phillips Petroleum Co
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Filing: 1947-01-14
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Granted: 1949-07-19
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Expires: 1967-01-14
Abstract
No abstract record available.
Inventors
- 👤 Carl J Helmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:17
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; C10G11/00; C10G11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |