Patent US3404162A successfully refreshed from Google Patents.
US3404162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro-2-oxo-3, 6-dimethyl-1, 4-dioxane
Assignee: EIDP Inc
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Filing: 1966-05-26
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Granted: 1968-10-01
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Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 Selman Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:03
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/185; C07C59/21; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C07D319/00; C07D319/10; C07D319/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
1 words
PERFLUORO-2-OXO-3,6-DIMETHYL-1,4-DIOXANE.
Claim 2
Dependent Claim
1 words
PERFLUORO-2-OXO-3,6-DIMETHYL-1,4-DIOXANE.
Claim 3
Dependent Claim
48 words
A PROCESS FOR PREPARING THE COMPOUND OF CLAIM 1 COMPRISING CONTACTING AND REACTING AT A TEMPERATURE BELOW 100*C. IN THE PRESENCE OF AN ALKALI METAL FLUORIDE CATALYST AND AN INERT APROTIC ORGANIC SOLVENT, PERFLUOROPYRUVYL FLUORIDE WITH HEXAFLUOROPROPYLENE EPOXIDE AND OBTAINING AS RESULT THEREOF SAID COMPOUND OF CLAIM 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |