Patent US3130242A successfully refreshed from Google Patents.
US3130242A
Expired / Lapsed
US
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Separation of isobutene from gases
Assignee: BASF SE
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Filing: 1961-06-05
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Granted: 1964-04-21
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Platz Rolf
- 👤 Kroeper Hugo
- 👤 Schloemer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:01
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/932
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |