US2820027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of trifluorochloroethylene
Assignee: 3M Co
•
Filing: 1954-09-07
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Granted: 1958-01-14
•
Expires: 1974-09-07
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR POLYMERIZING TRIFLUOROCHLOROETHYLENE MONOMER WHICH COMPRISES POLYMERIZING THE MONOMER IN THE PRESENCE OF AN ORGANIC PEROXIDE PROMOTER AND AT LEAST ABOUT 40 PRECENT BY WEIGHT, BASED UPON THE WEIGHT OF MOROMER CHARGED, OF A PERFLUORINATED TERTIARY ALKYL AMINE.
Claim 2
Dependent Claim
40 words
A PROCESS FOR POLYMERIZING TRIFLUOROCHLOROETHYLENE MONOMER WHICH COMPRISES POLYMERIZING THE MONOMER IN THE PRESENCE OF AN ORGANIC PEROXIDE PROMOTER AND AT LEAST ABOUT 40 PRECENT BY WEIGHT, BASED UPON THE WEIGHT OF MOROMER CHARGED, OF A PERFLUORINATED TERTIARY ALKYL AMINE.
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 |