Patent US3412172A successfully refreshed from Google Patents.
US3412172A
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US
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Recovery of high purity butadiene by cuprous salt particles in all-slurry process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-09-19
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Granted: 1968-11-19
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Feo Richard J De
- 👤 Robert P Cahn
- 👤 Jr Jesse M Carr
- 👤 Robert B Long
- 👤 Thornton L Cappel
- 👤 Cecchetti Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/06; C07C255/07; C07C255/08; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1807; C07C7/00; C07C7/11; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2389647A
Cited
US2973396A
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US2985697A
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US3080437A
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US3206521A
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US3242227A
Cited
US3348908A
Cited
US3340004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |