Patent US3541129A successfully refreshed from Google Patents.
US3541129A
Expired / Lapsed
US
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Process for the preparation of acrylonitrile
Assignee: UBE KOGYO KK
•
Filing: 1967-08-03
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Granted: 1970-11-17
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Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Keisho Yamada
- 👤 Sumio Umemura
- 👤 Kyoji Odan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:31
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |