US3510423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin separation process
Assignee: Universal Oil Products Co
•
Filing: 1968-04-05
•
Granted: 1970-05-05
•
Expires: 1988-04-05
Abstract
No abstract record available.
Inventors
- 👤 Richard W Neuzil
- 👤 Armand J De Rosset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/23; C07C51/235; C07C51/255; C07C51/265; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3201490A
Cited
US3218367A
Cited
US3274099A
Cited
US3291726A
Cited
US3342726A
Cited
US3331882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |