US2979487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension polymerization process
Assignee: Monsanto Chemicals Ltd
•
Filing: 1960-02-25
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Granted: 1961-04-11
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Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:00
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/32; C07D213/34; C08F255/00; C08F255/02; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A PROCESS FOR THE SUSPENSION POLYMERIZATION OF A VINYL HALIDE OF THE GROUP CONSISTING OF VINYL FLUORIDE, VINYL CHLORIDE AND VINYL BROMIDE IN WHICH THE VINYL HALIDE IS SUSPENDED AND POLYMERIZED IN WATER CONTAINING A WATERSOLUBLE INTERPOLYMER OF A MALEIC COMPOUND OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID AND MALEINIMIDE AND AN INTERPOLYMERIZABLE VINYLIDENE MONOMER AS A SUSPENDING AGENT FOR THE VINYLHALIDE POLYMER, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE POLYMERIZATION SYSTEM FROM 0.005 TO 2.0 WEIGHT PERCENT BASED UPON THE MONOMERS OF A HYDROXYL GROUP CONSISTING INTERPOLYMER AS AN AUXILIARY SUSPENDING AGENT, SAID HYDROXYL GROUP CONTAINING INTERPOLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF FROM 500 TO 20,000 AND BEING COMPRISED, IN COMBINATION, OF A PLURALITY OF POLYMERIZED MONOMER UNITS (A) OF THE FORMULA:
Claim 2
Dependent Claim
128 words
IN A PROCESS FOR THE SUSPENSION POLYMERIZATION OF A VINYL HALIDE OF THE GROUP CONSISTING OF VINYL FLUORIDE, VINYL CHLORIDE AND VINYL BROMIDE IN WHICH THE VINYL HALIDE IS SUSPENDED AND POLYMERIZED IN WATER CONTAINING A WATERSOLUBLE INTERPOLYMER OF A MALEIC COMPOUND OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID AND MALEINIMIDE AND AN INTERPOLYMERIZABLE VINYLIDENE MONOMER AS A SUSPENDING AGENT FOR THE VINYLHALIDE POLYMER, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE POLYMERIZATION SYSTEM FROM 0.005 TO 2.0 WEIGHT PERCENT BASED UPON THE MONOMERS OF A HYDROXYL GROUP CONSISTING INTERPOLYMER AS AN AUXILIARY SUSPENDING AGENT, SAID HYDROXYL GROUP CONTAINING INTERPOLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF FROM 500 TO 20,000 AND BEING COMPRISED, IN COMBINATION, OF A PLURALITY OF POLYMERIZED MONOMER UNITS (A) OF THE FORMULA:
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |