US3373219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the selective hydrogenation of c4-fractions
Assignee: Bayer AG
•
Filing: 1966-10-26
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Granted: 1968-03-12
•
Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Kronig Walter
- 👤 Mayrhofer Wilhelm
- 👤 Scharfe Gerhard
- 👤 Halcour Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J23/40; B01J23/44; C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/08; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/38; C07C2523/40; C07C2523/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126426A
Cited
US2474440A
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US3075917A
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US3036137A
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US3091654A
Cited
US3200167A
Cited
GB974038A
Cited
US3291755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |