US3445378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process
Assignee: Universal Oil Products Co
•
Filing: 1967-10-11
•
Granted: 1969-05-20
•
Expires: 1987-10-11
Abstract
No abstract record available.
Inventors
- 👤 Richard R De Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:59
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/22; C07; C07C; C07C7/00; C07C7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2500329A
Cited
US3326781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |