Patent CH215642A successfully refreshed from Google Patents.
US3250808A
Expired / Lapsed
US
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Fluorocarbon ethers derived from hexafluoropropylene epoxide
Assignee: EIDP Inc
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Filing: 1963-10-31
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Granted: 1966-05-10
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Expires: 1983-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Earl Phillip Moore
- 👤 Jr Alwin S Milian
- 👤 Eleuterio Herbert Sousa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:11
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C51/00; C07C51/58; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/044; C10M2211/06; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/28; C10N; C10N2010/00; C10N2010/02; C10N2010/06; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A FLUOROCARBON ETHER HAVING FORMULAS SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
11 words
A FLUOROCARBON ETHER HAVING FORMULAS SELECTED FROM THE CLASS CONSISTING OF
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |