US2791000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric dispersions and method of use thereof
Assignee: EIDP Inc
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Filing: 1955-12-21
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Granted: 1957-05-07
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Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Fredrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/11; C08J2359/00; C08J2359/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR SHAPING AN ADDITION POLYMER OF FORMALDEHYDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.8 AS MEASURED AN 0.5% SOLUTION AT 60*C. IN P-CHLOROPHENOL CONTAINING 2% ALPHA-PINENE, WHICH COMPRISES DISPERSING PARTICLES OF SAID POLYMER OF LESS THAN 6 MICRONS AVERAGE DIAMETER IN AN ORGANIC LIQUID TO FORM A DISPERSION CONTAINING 0.5% TO 40% OF POLYMER PARTICLES, SAID LIQUID BEING ONE WHICH HAS A BOILING POINT OF 150*C. TO 240*C. AND IS A LATENT SOLVENT FOR SAID POLYMER, BEING A NON-SOLVENT THEREFOR AT TEMPERATURES BELOW 100*C. AND A SOLVENT THEREFOR ABOVE 100*C., DEPOSITING THE DISPERSION ON A SUPPORTING SURFACE, HEATING THE DISPOSITING DISPERSION TO A TEMPERATURE ABOVE 100*C. TO COALESCE SAID POLYMER PARTICLES BY LATENT SOLVENT ACTION OF SAID LIQUID, AND REMOVING LIQUID FROM SAID COALESCED POLYMER TO FORM A HOMAGENEOUS SHAPED STRUCTURE.
Claim 2
Dependent Claim
134 words
A PROCESS FOR SHAPING AN ADDITION POLYMER OF FORMALDEHYDE HAVING AN INHERENT VISCOSITY OF AT LEAST 0.8 AS MEASURED AN 0.5% SOLUTION AT 60*C. IN P-CHLOROPHENOL CONTAINING 2% ALPHA-PINENE, WHICH COMPRISES DISPERSING PARTICLES OF SAID POLYMER OF LESS THAN 6 MICRONS AVERAGE DIAMETER IN AN ORGANIC LIQUID TO FORM A DISPERSION CONTAINING 0.5% TO 40% OF POLYMER PARTICLES, SAID LIQUID BEING ONE WHICH HAS A BOILING POINT OF 150*C. TO 240*C. AND IS A LATENT SOLVENT FOR SAID POLYMER, BEING A NON-SOLVENT THEREFOR AT TEMPERATURES BELOW 100*C. AND A SOLVENT THEREFOR ABOVE 100*C., DEPOSITING THE DISPERSION ON A SUPPORTING SURFACE, HEATING THE DISPOSITING DISPERSION TO A TEMPERATURE ABOVE 100*C. TO COALESCE SAID POLYMER PARTICLES BY LATENT SOLVENT ACTION OF SAID LIQUID, AND REMOVING LIQUID FROM SAID COALESCED POLYMER TO FORM A HOMAGENEOUS SHAPED STRUCTURE.
References Cited (Backward Citations)
US1557521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |