US2497638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of alkenyl diesters of alkenylphosphonic acids with methyl methacrylate
Assignee: Victor Chemical Works
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Filing: 1946-04-24
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Granted: 1950-02-14
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Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Toy Arthur Dock Fon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
C; C08; C08F; C08F30/00; C08F30/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A METHOD WHICH COMPRISES REACTING FROM 30 TO 99% BY VOLUME OF METHYL METHACRYLATE WITH 70 TO 1% BY VOLUME OF A BETA, GAMMA ALKENYL DIESTER OF AN ALKENYLPHOSPHONIC ACID SELECTED FROM THE CLASS CONSISTING OF ALKYL AND PHENYL SUBSTITUTED ENTHENYLPHOSPHONIC ACIDS IN THE PRESENCE OF AN ORGANIC PEROXIDE POLYMERIZATION CATALYST AT ABOUT 70 TO 80*C. FOR A PERIOD OF TIME SUFFICIENT TO FORM A COPOLYMER.
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |