Patent US2634684A successfully refreshed from Google Patents.
US3766252A
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Unsaturated carboxylic acid derivatives containing phosphorus
Assignee: Hoechst AG
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Filing: 1971-10-26
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Granted: 1973-10-16
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Expires: 1991-10-26
Abstract
Abstract PHOSPHONYLALKYL (METH)-ACRYLATES ARE USEFUL MONOMERS FOR THE PREPARATION OF FLAME-PROOF COPOLYMERS HAVING AN IMPROVED AFFINITY FOR DYESTUFFS. THE NEW COMPOUNDS ARE OBTAINED BY ACYLATION OF PHOSPHONYLALKYL ALCOHOLS OR AMINES WITH ACYLATING (METH-)ACRYLIC ACID DERIVATIVES.
Inventors
- 👤 E Schmidt
- 👤 C Beermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |