US3492314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for catalytic hydrogenation of dicarboxylic acid anhydride and catalyst therefor
Assignee: Mitsubishi Chemical Corp
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Filing: 1966-08-16
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Granted: 1970-01-27
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Expires: 1986-08-16
Abstract
No abstract record available.
Inventors
- 👤 Taisuke Asano
- 👤 Junichi Kanetaka
- 👤 Kenzo Miyake
- 👤 Hiroshi Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:30
CPC Classifications
C; C07; C07D; C07D315/00; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B01J23/76; B01J23/84; B01J23/889; B01J23/8896; C07C; C07C51/00; C07C51/347; C07C51/36; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
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) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |