Patent US2419570A successfully refreshed from Google Patents.
US3784586A
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US
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Copolymerizable composition of oligo-esters having maleic acid end groups and vinyl monomers
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1970-10-26
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Granted: 1974-01-08
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Expires: 1990-10-26
Abstract
Abstract A PROCESS FOR PREPARATION OF COPOLYMERIZABLE COMPOSITIONS COMPRISING REACTING MALEIC ANHDRIDE WITH ONE OR MORE POLYHYDROXYLATED COMPOUNDS IN THE RATIO OF 1 MOLE MALEIC ANHDRIDE PER HYDROXYL GROUP OF THE RANGE OF Y LATED COMPOUNDS AT A TEMPERATURE WITHIN THE RANGE OF 50-100* C. UNTIL A HYDROXYL NUMBER OF 20 OR BELOW IS REACHED AND THEREAFTER ADDING AT A TEMPERATURE WITHIN ONE RANGE OF ROOM TEMPERATURE TO 100* C. OF AT LEAST ONE CROSS-LINKING VINYL MONOMER IN THE PRESENCE OF A POLYMERIZATION INHIBITOR.
Inventors
- 👤 P Thomas
- 👤 J Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |