US3439028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alpha,beta-unsaturated carboxylic acid
Assignee: RIKEN
•
Filing: 1964-03-23
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Granted: 1969-04-15
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Masaya Yanagita
- 👤 Masao Kitahara
- 👤 Takashi Mitsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:47
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/24; B01J23/28; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8877; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/195; B01J27/198; B01J27/199; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3087964A
Cited
GB903034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |