US3498755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for effecting a multiple stage contact of a reactant stream
Assignee: Universal Oil Products Co
•
Filing: 1966-05-26
•
Granted: 1970-03-03
•
Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 Henry C Borre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/005; B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0476; B01J8/048; B01J8/0492; B01J8/0496; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C10G49/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2461331A
Cited
US2452569A
Cited
US2535944A
Cited
US2892262A
Cited
US3214247A
Cited
US3227527A
Cited
US3353924A
Cited
US3378349A
Cited
US3433600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |