US2643245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers and copolymer emulsions of salts of monoalkyl esters of maleic acid
Assignee: SHAWINGIAN RESINS Corp
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Filing: 1951-05-29
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Granted: 1953-06-23
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Wilfred K Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:51
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A BATCH COPOLYMERIZATION PROCESS WHICH COMPRISES REACTING TOGETHER IN AN AQUEOUS MEDIUM AND IN THE PRESENCE OF A POLYMERIZATION CATALYST, 10 MOLS OF A VINYL ESTER OF AN ALIPHATIC ACID CONTAINING 2-6 CARBON ATOMS WITH 0.25-1.0 MOL OF AN MONOALKYL ESTER OF MALEIC ACID REACTED WITH AN ALKALINE REACTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL COMPOUNDS.
Claim 2
Dependent Claim
61 words
A BATCH COPOLYMERIZATION PROCESS WHICH COMPRISES REACTING TOGETHER IN AN AQUEOUS MEDIUM AND IN THE PRESENCE OF A POLYMERIZATION CATALYST, 10 MOLS OF A VINYL ESTER OF AN ALIPHATIC ACID CONTAINING 2-6 CARBON ATOMS WITH 0.25-1.0 MOL OF AN MONOALKYL ESTER OF MALEIC ACID REACTED WITH AN ALKALINE REACTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL COMPOUNDS.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |