US2820026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fluorine containing polymers
Assignee: 3M Co
•
Filing: 1953-06-11
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Granted: 1958-01-14
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Passino
- 👤 Albert L Dittman
- 👤 John M Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID FLUORINE-CONTAINING POLYMER WHICH COMPRISES POLYMERIZING A SUBSTITUTED ETHYLENE COMPOUND HAVING AT LEAST 2 FLUORINE ATOMS IN THE MOLECULE AT A TEMPERATURE ABOVE 0*C. AND BELOW 40*C. IN THE PRESENCE OF AN AQUEOUSSUSPENSION MEDIUM CONTAINING A WATER-SOLUBLE INORGANIC PEROXIDE AS A PROMOTER, A WATER-SOLUBLE REDUCING AGENT
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID FLUORINE-CONTAINING POLYMER WHICH COMPRISES POLYMERIZING A SUBSTITUTED ETHYLENE COMPOUND HAVING AT LEAST 2 FLUORINE ATOMS IN THE MOLECULE AT A TEMPERATURE ABOVE 0*C. AND BELOW 40*C. IN THE PRESENCE OF AN AQUEOUSSUSPENSION MEDIUM CONTAINING A WATER-SOLUBLE INORGANIC PEROXIDE AS A PROMOTER, A WATER-SOLUBLE REDUCING AGENT
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |