US2810702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl fluoride dispersions
Assignee: EIDP Inc
•
Filing: 1953-04-10
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Granted: 1957-10-22
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Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Fredrick
- 👤 Bro Manville Isager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/14; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A DISPERSION OF CLUSTERS OF POLYVINYL FLUORIDE PARTICLES, THE AVERAGE DIAMETER OF SAID CLUSTER BEING AT LEAST TWICE THE AVERAGE DIAMETER OF THE PRIMARY ARTICLES AND IN THE APPROXIMATE RANGE OF 0.4 TO 20 MICRONS, IN AND AQUEOUS LIQUID MEDIUM CONTAINING LATENT SOLVENT MEANS TO COALESCE SAID POLYVINLY FLUORIDE PARTICLES AT TEMPERAURES ABOVE 100*C. INTO A COHERENT HOMOGENEOUS STRUCTURE UPON REMOVAL OF THE AQUEOUS LIQUID MEDIUM, SAID LATENT SOLVENT MEANS BEING FURTHER CHARACTERIZED BY BEING AN ORGANIC LIQUID HAVING A BOILING POINT BETWEEN 100* C. AND 300*C. AND A SOLUBILITY OF AT LEAST 1 PART IN 2 PARTS OF WATER, SAID ORGANIC LIQUID BEING POINT A NON-SOLVENT FOR POLYVINYL FLUORIDE BELOW 100* C. BUT A SOLVENT THEREFOR AT HIGHER TEMPERATURES, SAID DISPERSION ESSENTIALLY COMPRISING, BY WEIGHT, 5% TO 30% OF SAID POLYVINYL FLOURIDE, 20% TO 60% OF SAID ORGANIC LIQUID, AND 30% TO 60% OF WATER, THE AMOUNT OF SAID ORGANIC LIQUID BEING 1 TO 12 TIMES THE WEIGHT OF SAID POLYVINYL FLUORIDE AND 0.5 TO 1.5 TIMES THE WEIGHT OF WATER.
Claim 2
Dependent Claim
172 words
A DISPERSION OF CLUSTERS OF POLYVINYL FLUORIDE PARTICLES, THE AVERAGE DIAMETER OF SAID CLUSTER BEING AT LEAST TWICE THE AVERAGE DIAMETER OF THE PRIMARY ARTICLES AND IN THE APPROXIMATE RANGE OF 0.4 TO 20 MICRONS, IN AND AQUEOUS LIQUID MEDIUM CONTAINING LATENT SOLVENT MEANS TO COALESCE SAID POLYVINLY FLUORIDE PARTICLES AT TEMPERAURES ABOVE 100*C. INTO A COHERENT HOMOGENEOUS STRUCTURE UPON REMOVAL OF THE AQUEOUS LIQUID MEDIUM, SAID LATENT SOLVENT MEANS BEING FURTHER CHARACTERIZED BY BEING AN ORGANIC LIQUID HAVING A BOILING POINT BETWEEN 100* C. AND 300*C. AND A SOLUBILITY OF AT LEAST 1 PART IN 2 PARTS OF WATER, SAID ORGANIC LIQUID BEING POINT A NON-SOLVENT FOR POLYVINYL FLUORIDE BELOW 100* C. BUT A SOLVENT THEREFOR AT HIGHER TEMPERATURES, SAID DISPERSION ESSENTIALLY COMPRISING, BY WEIGHT, 5% TO 30% OF SAID POLYVINYL FLOURIDE, 20% TO 60% OF SAID ORGANIC LIQUID, AND 30% TO 60% OF WATER, THE AMOUNT OF SAID ORGANIC LIQUID BEING 1 TO 12 TIMES THE WEIGHT OF SAID POLYVINYL FLUORIDE AND 0.5 TO 1.5 TIMES THE WEIGHT OF WATER.
References Cited (Backward Citations)
US2510783A
Cited
US2600681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |