US2637119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying granular vinyl ester polymers
Assignee: Shawinigan Chemicals Ltd
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Filing: 1950-06-27
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Granted: 1953-05-05
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Expires: 1970-06-27
Abstract
No abstract record available.
Inventors
- 👤 Leo M Germain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/24; C08F6/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR REMOVING ABSORBED WATER FROM GRANULAR POLYMERS OF VINLY ACETATE, COMPRISING (1) BOILING A MIXTURE OF THE POLYMER GRANULES AND A LIQUID ENTRAINER WHICH BOILS UNDER REFLUX BELOW 100* C., WHICH IS NOT MISCIBLE WITH WATER, AND IS NOT A SOLVENT FOR THE POLYMER, TOGETHER WITH A SMALL PROPORTION OF AN OIL-SOLUBLE DETERGENT, (2) CONDENSING THE SO GENERATED VAPORS, REMOVING THE ENTRAINED WATER, AND RETURNING THE WATER-FREE ENTRAINING AGENT TO THE BOILING MIXTURE, AND (3) CONTINUING THE BOILING UNTIL A SUBSTANTIAL PROPORTION OF THE ABSORBED WATER CONTAINED IN THE GRANULAR POLYMERS HAS BEEN REMOVED.
Claim 2
Dependent Claim
96 words
A PROCESS FOR REMOVING ABSORBED WATER FROM GRANULAR POLYMERS OF VINLY ACETATE, COMPRISING (1) BOILING A MIXTURE OF THE POLYMER GRANULES AND A LIQUID ENTRAINER WHICH BOILS UNDER REFLUX BELOW 100* C., WHICH IS NOT MISCIBLE WITH WATER, AND IS NOT A SOLVENT FOR THE POLYMER, TOGETHER WITH A SMALL PROPORTION OF AN OIL-SOLUBLE DETERGENT, (2) CONDENSING THE SO GENERATED VAPORS, REMOVING THE ENTRAINED WATER, AND RETURNING THE WATER-FREE ENTRAINING AGENT TO THE BOILING MIXTURE, AND (3) CONTINUING THE BOILING UNTIL A SUBSTANTIAL PROPORTION OF THE ABSORBED WATER CONTAINED IN THE GRANULAR POLYMERS HAS BEEN REMOVED.
References Cited (Backward Citations)
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |