US3531398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization of heavy petroleum distillates
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1968-05-03
•
Granted: 1970-09-29
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Expires: 1988-05-03
Abstract
No abstract record available.
Inventors
- 👤 Clark E Adams
- 👤 William T House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J35/00; B01J35/60; B01J35/61; B01J35/63; B01J35/64; B01J35/66; C; C10; C10G; C10G2400/00; C10G2400/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA711692A
Cited
US2900332A
Cited
US3162597A
Cited
US3169918A
Cited
US3205165A
Cited
US3306845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |