Patent US2888446A successfully refreshed from Google Patents.
US2888446A
Expired / Lapsed
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Manufacture of ethylenic fluorine-containing polymers
Assignee: 3M Co
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Filing: 1954-08-26
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Granted: 1959-05-26
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Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph L Herbst
- 👤 Billy F Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:41
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR POLYMERIZING A SUBSTITUTED 2 TO 4 CARBON OLEFIN MONOMER HAVING AT LEAST TWO FLUORINE ATOMS WHICH COMPRISES POLYMERIZING THE MONOMER AT A PRESSURE SUFFICIENT TO MAINTAIN THE MONOMER IN THE LIQUID PHASE AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 250* C. IN THE PRESENCE OF HYDROGEN PEROXIDE AS A PROMOTER AND NOT MORE THAN ABOUT 2.5 PARTS BY WEIGHT OF WATER PER 100 PARTS BY WEIGHT OF MONOMER.
Claim 2
Dependent Claim
73 words
A PROCESS FOR POLYMERIZING A SUBSTITUTED 2 TO 4 CARBON OLEFIN MONOMER HAVING AT LEAST TWO FLUORINE ATOMS WHICH COMPRISES POLYMERIZING THE MONOMER AT A PRESSURE SUFFICIENT TO MAINTAIN THE MONOMER IN THE LIQUID PHASE AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 250* C. IN THE PRESENCE OF HYDROGEN PEROXIDE AS A PROMOTER AND NOT MORE THAN ABOUT 2.5 PARTS BY WEIGHT OF WATER PER 100 PARTS BY WEIGHT OF MONOMER.
References Cited (Backward Citations)
US2564024A
Cited
US2716109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |