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US3803091A
Expired / Lapsed
US
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Novel alkylidene bis-amides
Assignee: Lubrizol Corp
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Filing: 1971-03-22
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Granted: 1974-04-09
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Expires: 1991-03-22
Abstract
Abstract ALKYLIDENE BIS-AMIDES ARE PREPARED BY REACTING A CARBOXYLIC ACID AMIDE (ESPECIALLY ACRYLAMIDE) WITH A KETAL, ALKENYL CARBOXYLATE OR ALKENYL SULFIDE IN THE PRESENCE OF AN ACID CATALYST. THEY ARE USEFUL AS CHEMICS AL INTERMEDIATES AND AS CROSSLINKING MONOMERS.
Inventors
- 👤 D Murfin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:14
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |