US3518323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of butylenes
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1968-06-26
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Granted: 1970-06-30
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Expires: 1988-06-26
Abstract
No abstract record available.
Inventors
- 👤 Lloyd A Pine
- 👤 Durward T Roberts Jr
- 👤 Gordon B Jolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:58
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C7/00; C07C7/148; C07C7/177; C07C2521/00; C07C2521/12; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |