Patent US3737412A successfully refreshed from Google Patents.
US3737412A
Expired / Lapsed
US
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Methylolated olefin-maleimide copolymers and method for preparing
Assignee: Monsanto Co
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Filing: 1971-09-07
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Granted: 1973-06-05
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Expires: 1991-09-07
Abstract
Abstract N-HYDROXYMETHYL- AND/OR N-HALOMETHYL OLEFIN-MALEIMIDE COPOLYMERS AS NEW COMPOSITIONS OF MATTER, THE PROCESS OF PREPARING SAID N-HYDROXYMETHYL COPOLYMERS FROM OLEFIN-MALEIMIDE COPOLYMERS AND FORMALDEHYDE, AND THE PROCESS OF PREPARING SAID HALOMETHYL COPOLYMERS FROM SAID HYDROXYMETHYL COPOLYMERS AND A HALOGENATING AGENT. THE NEW COMPOSITION OF MATTER ARE USEFUL AS RESINOUS SUBSTRATE IN BIOPOLYMER SYNTHESIS.
Inventors
- 👤 B Wildi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:22
CPC Classifications
C; C08; C08F; C08F8/00
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |