US3485887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment by hydrogenation of c4-hydrocarbons containing butadiene and n-but-1-ene
Assignee: Bayer AG
•
Filing: 1967-05-29
•
Granted: 1969-12-23
•
Expires: 1987-05-29
Abstract
No abstract record available.
Inventors
- 👤 Walter Kronig
- 👤 Wilhelm Mayrhofer
- 👤 Gerhard Scharfe
- 👤 Wulf Schwerdtel
- 👤 Kurt Halcour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:33
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J27/00; B01J27/06; B01J27/128; B01J27/13; C07C5/00; C07C5/02; C07C5/03; C07C5/05; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/06; C07C2523/38; C07C2523/40; C07C2523/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2960551A
Cited
US2946829A
Cited
US3113983A
Cited
US3290404A
Cited
US3373219A
Cited
US3291755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |