US2915483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticized perfluorochloroethylene polymer and process for preparing porous articles therefrom
Assignee: 3M Co
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Filing: 1953-12-30
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Granted: 1959-12-01
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Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 William S Barnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26; B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/003; B01D71/00; B01D71/06; B01D71/30; B01D71/32; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PREPARING POROUS PERFLUOROCHLOROETHYLENE POLYMER ARTICLES WHICH COMPRISES ADMIXING BETWEEN ABOUT 25 AND ABOUT 50 WEIGHT PERCENT OF A NORMALLY SOLID PERFLUOROCHLOROETHYLENE POLYMER WITH A DISTILLABLE PERFLUOROCHLOROETHYLENE POLYMER WHICH CONSISTS ESSENTIALLY OF AN ADMIXTURE OF BETWEEN ABOUT 30 AND ABOUT 80 WEIGHT PERCENT OF A WAXY PERFLUOROCHLOROETHYLENE POLYMER HAVING A MELTING POINT BETWEEN ABOUT 75*C. AND ABOUT 125*C. AND A NORMALLY LIQUID PERFLUOROCHLOROETHYLENE POLYMER HAVING A BOILING RANGE BETWEEN ABOUT 300*C. AND ABOUT 450*C. AT ATMOSPHERIC PRESSURE MOLDING SAID ADMIXTURE AT A TEMPERATURE BETWEEN ABOUT 212*C. AND ABOUT 330*C. AND A PRESSURE BETWEEN ABOUT 500 AND ABOUT 2500 POUNDS PER SQUARE INCH AND EXTRACTING THE DISTILLABLE PERFLUOROCHLOROETHYLENE POLYMER WITH A SUITABLE SOLVENT.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PREPARING POROUS PERFLUOROCHLOROETHYLENE POLYMER ARTICLES WHICH COMPRISES ADMIXING BETWEEN ABOUT 25 AND ABOUT 50 WEIGHT PERCENT OF A NORMALLY SOLID PERFLUOROCHLOROETHYLENE POLYMER WITH A DISTILLABLE PERFLUOROCHLOROETHYLENE POLYMER WHICH CONSISTS ESSENTIALLY OF AN ADMIXTURE OF BETWEEN ABOUT 30 AND ABOUT 80 WEIGHT PERCENT OF A WAXY PERFLUOROCHLOROETHYLENE POLYMER HAVING A MELTING POINT BETWEEN ABOUT 75*C. AND ABOUT 125*C. AND A NORMALLY LIQUID PERFLUOROCHLOROETHYLENE POLYMER HAVING A BOILING RANGE BETWEEN ABOUT 300*C. AND ABOUT 450*C. AT ATMOSPHERIC PRESSURE MOLDING SAID ADMIXTURE AT A TEMPERATURE BETWEEN ABOUT 212*C. AND ABOUT 330*C. AND A PRESSURE BETWEEN ABOUT 500 AND ABOUT 2500 POUNDS PER SQUARE INCH AND EXTRACTING THE DISTILLABLE PERFLUOROCHLOROETHYLENE POLYMER WITH A SUITABLE SOLVENT.
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |