US3684786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing perfluoro-2-butyne polymer
Assignee: Honeywell International Inc
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Filing: 1971-11-26
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Granted: 1972-08-15
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Expires: 1991-11-26
Abstract
Abstract Solid homopolymer of perfluoro-2-butyne is prepared by polymerizing perfluoro-2-butyne using small amounts of trifluoromethyl hypofluorite as initiator.
Inventors
- 👤 Swayambu Chandrasekaran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:49
CPC Classifications
C; C08; C08F; C08F38/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
The method of claim 1 wherein the trifluoromethyl hypofluorite is employed in amount of between about 0.01 and about 10 percent by weight, based on the weight of the perfluoro 2-butyne.
Claim 2
Dependent Claim
14 words
The method of claim 1 conducted in the presence of a non-polymerizable organic solvent.
Claim 3
Dependent Claim
11 words
The method of claim 1 conducted in an aqueous polymerization medium.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |