US2508342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl resin emulsion
Assignee: Shawinigan Resins Corp
•
Filing: 1946-11-22
•
Granted: 1950-05-16
•
Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Wilfred K Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
C; C08; C08F; C08F251/00; C08F251/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR PREPARING A STABLE AQUEOUS EMULSION OF POLYVINYL ACETATE WHICH COMPRISES POLYMERIZING VINYL ACETATE WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING FOR EVERY 100 PARTS OF WATER, 1-10 PARTS OF A HYDROXY ETHYLE CELLULOSE, 0.01-2.0 PARTS OF A NON-POLYMERIZABLE SURFACE TENSION DEPRESSANT CHARACTERIZED BY CONTAINING AN ALKALI METAL SULFONATE OF AN ALKYL ARYL HYDROCARBON, SAID HYDROCARBON CONTAINING 10-20 CARBON ATOMS, AND A SUFFICIENT AMOUNT OF A WATER SOLUBLE PERSULFATE TO SUPPLY 0.001-0.1 PART OF AVAILABLE OXYGEN, THE VINYL ACETATE BEING INTRODUCED AT SUCH A RATE THAT NOT OVER ABOUT 25 PARTS OF MONOMER FOR EVERY 100 PARTS OF WATER ARE PRESSENT SUBSTANTIALLY THROUGHOUT THE POLYMERIZATION, AND THE WEIGHT RATIO OF WATER TO TOTAL VINYL ACETATE INTRODUCED AND POLYMERIZED IS BETWEEN 100:30 AND 100:60, WHEREBY THE POLYMER/PARTICLES HAVE A DIAMETER OF 0.05-0.2 MICRON.
Claim 2
Dependent Claim
134 words
A PROCESS FOR PREPARING A STABLE AQUEOUS EMULSION OF POLYVINYL ACETATE WHICH COMPRISES POLYMERIZING VINYL ACETATE WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING FOR EVERY 100 PARTS OF WATER, 1-10 PARTS OF A HYDROXY ETHYLE CELLULOSE, 0.01-2.0 PARTS OF A NON-POLYMERIZABLE SURFACE TENSION DEPRESSANT CHARACTERIZED BY CONTAINING AN ALKALI METAL SULFONATE OF AN ALKYL ARYL HYDROCARBON, SAID HYDROCARBON CONTAINING 10-20 CARBON ATOMS, AND A SUFFICIENT AMOUNT OF A WATER SOLUBLE PERSULFATE TO SUPPLY 0.001-0.1 PART OF AVAILABLE OXYGEN, THE VINYL ACETATE BEING INTRODUCED AT SUCH A RATE THAT NOT OVER ABOUT 25 PARTS OF MONOMER FOR EVERY 100 PARTS OF WATER ARE PRESSENT SUBSTANTIALLY THROUGHOUT THE POLYMERIZATION, AND THE WEIGHT RATIO OF WATER TO TOTAL VINYL ACETATE INTRODUCED AND POLYMERIZED IS BETWEEN 100:30 AND 100:60, WHEREBY THE POLYMER/PARTICLES HAVE A DIAMETER OF 0.05-0.2 MICRON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |