Patent US3513632A successfully refreshed from Google Patents.
US3513632A
Expired / Lapsed
US
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Separation of acrylic acid and acrolein
Assignee: Union Carbide Corp
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Filing: 1968-12-18
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Granted: 1970-05-26
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Expires: 1988-12-18
Abstract
No abstract record available.
Inventors
- 👤 Lawrence G Hess
- 👤 Donald C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:42
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C45/00; C07C45/78; C07C45/783; C07C45/81; C07C51/16; C07C51/21; C07C51/25; C07C51/252; C07C51/48
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |