US2415537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbon oil
Assignee: Phillips Petroleum Co
•
Filing: 1944-09-18
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Granted: 1947-02-11
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Expires: 1964-09-18
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Carl J Helmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:08
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/10; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903
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) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |