Patent US2545702A successfully refreshed from Google Patents.
US2545702A
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Process for preparing stable polystyrene emulsions
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-05-15
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Granted: 1951-03-20
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Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Forrest H Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
C; C08; C08F; C08F267/00; C08F267/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PREPARING STABLE SUSPENSIONS WHICH COMPRISES POLYMERIZING 100 PARTS OF STYRENE WITH SUBSTANTIALLY CONSTANT AGITATION IN AN AQUEOUS MEDIUM COMPRISING A WATER SOLUTION CONTAINING FROM 0.1 TO 5 PARTS OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SALTS OF A COPOLYMER OF A VINYL ESTER OF A LOWER ALIPHATIC ACID AND MALEIC ANHYDRIDE AND FROM 0.1 TO 5 PARTS OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SALTS OF MONOCARBOXYLIC ALIPHATIC ACIDS CONTAINING FROM 12 TO 20 CARBON ATOMS.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PREPARING STABLE SUSPENSIONS WHICH COMPRISES POLYMERIZING 100 PARTS OF STYRENE WITH SUBSTANTIALLY CONSTANT AGITATION IN AN AQUEOUS MEDIUM COMPRISING A WATER SOLUTION CONTAINING FROM 0.1 TO 5 PARTS OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SALTS OF A COPOLYMER OF A VINYL ESTER OF A LOWER ALIPHATIC ACID AND MALEIC ANHYDRIDE AND FROM 0.1 TO 5 PARTS OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SALTS OF MONOCARBOXYLIC ALIPHATIC ACIDS CONTAINING FROM 12 TO 20 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |