US2912373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of fluoroethylene monomers
Assignee: 3M Co
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Filing: 1957-11-08
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Granted: 1959-11-10
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Expires: 1977-11-08
Abstract
No abstract record available.
Inventors
- 👤 Norman G Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:42
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR PREPARING A SUSPENSOID OF POLYFLUOROETHYLENE POLYMERS WHICH COMPRISES CONTACTING AT LEAST ONE POLYFLUOROETHYENE MONOMER AT A TEMPERATURE OF ABOUT 0* C. TO ABOUT 200* C. UNDER A PRESSURE OF ABOUT 1 TO 100 ATMOSPHERES WITH AN AQUEOUS SOLUTION OF AN AMOUNT SUFFICIENT TO CATALYZE THE POLYMERIZATION OF SAID MONOMER OF A COMPOUND OF THE GROUP CONSISTING OF KETO-ACIDS AND WATER-SOLUBLE DERIVATIVES THEREOF, THE SAID ACIDS BEING REPRESENTED BY THE FORMULAE
Claim 2
Dependent Claim
73 words
A PROCESS FOR PREPARING A SUSPENSOID OF POLYFLUOROETHYLENE POLYMERS WHICH COMPRISES CONTACTING AT LEAST ONE POLYFLUOROETHYENE MONOMER AT A TEMPERATURE OF ABOUT 0* C. TO ABOUT 200* C. UNDER A PRESSURE OF ABOUT 1 TO 100 ATMOSPHERES WITH AN AQUEOUS SOLUTION OF AN AMOUNT SUFFICIENT TO CATALYZE THE POLYMERIZATION OF SAID MONOMER OF A COMPOUND OF THE GROUP CONSISTING OF KETO-ACIDS AND WATER-SOLUBLE DERIVATIVES THEREOF, THE SAID ACIDS BEING REPRESENTED BY THE FORMULAE
References Cited (Backward Citations)
US2816082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |