US3485771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma activation of catalysts
Assignee: Phillips Petroleum Co
•
Filing: 1966-12-29
•
Granted: 1969-12-23
•
Expires: 1986-12-29
Abstract
No abstract record available.
Inventors
- 👤 Bert Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/34; B01J37/349; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1865180A
Cited
US2987487A
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US3151944A
Cited
US2985597A
Cited
US3235508A
Cited
US3264226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |