US3131142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydro-cracking
Assignee: Phillips Petroleum Co
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Filing: 1961-10-13
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Granted: 1964-04-28
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jr King L Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:34
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; B01J31/02; B01J31/04; C; C10; C10G; C10G47/00; C10G47/02; C10G67/00; C10G67/02; C10G67/10
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |