US3598792A
Expired / Lapsed
US
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Polymers from diesters of n-acrylyliminodiacetic acids
Assignee: WR Grace and Co
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Filing: 1969-11-19
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Granted: 1971-08-10
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Expires: 1989-11-19
Abstract
Abstract POLYMERS AND COPOLYMERS OF DIESTERS OF N-ARCYLYLIMINODIACETIC ACIDS ARE PREPARED BY IRRADIATING SUCH DIESTERS OR MIXTURES THEREOF WITH METHYL ACRYLATE, METHYL METHACRYLATE, A VINYLPYRIDINE, N-VINYLPYRROLIDONE, STYRENE, ACRYLONITRILE, OR VINYL ACETATE. THESE POLYMERS AND COPOLYMERS ARE ALSO PREPARED BY TREATING SUCH DIESTERS OR MIXTURES THEREOF WITH METHYL ACRYLATE, METHYL METHACRYLATE, A VINYLPYRIDINE, N-VINYLPYRROLIDONE, STYRENE, ACRYLONITRILE, OR VINYL ACETATE WITH A FREE RADICAL INITIATOR. THESE POLYMERS CAN BE HYDROLYZED (OR SAPONIFIED AND ACIDIFIED) TO CONVERT THEM FROM THE ESTER FORM TO THE CARBOXYLIC FORM.
Inventors
- 👤 Donald E Jefferson
- 👤 Nelson S Marans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |