US3536452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple reactor apparatus
Assignee: Marathon Oil Co
•
Filing: 1965-04-21
•
Granted: 1970-10-27
•
Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Norton
- 👤 Robert D Holly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
B; B01; B01L; B01L99/00; G; G01; G01N; G01N35/00; G01N35/02; G01N35/025; G01N2035/00346; G01N2035/00356; G01N30/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1601879A
Cited
US2055704A
Cited
US2304398A
Cited
US2560107A
Cited
US2710715A
Cited
US2704741A
Cited
US3081158A
Cited
US3187486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |