US3549519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed-phase thermal cracking process
Assignee: Universal Oil Products Co
•
Filing: 1968-10-28
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Granted: 1970-12-22
•
Expires: 1988-10-28
Abstract
No abstract record available.
Inventors
- 👤 William H Munro
- 👤 Robert J J Hamblin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/22; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932174A
Cited
US2526966A
Cited
US2900327A
Cited
US2756186A
Cited
US3027317A
Cited
US3371029A
Cited
US3402122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |