US3242218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing fluorocarbon polyethers
Assignee: EIDP Inc
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Filing: 1961-03-29
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Granted: 1966-03-22
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Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 William T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:10
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C51/00; C07C51/58; C07C59/00; C07C59/125; C07C59/135; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/22; C08G65/223; C08G65/226; C08G65/32; C08G65/321; C08G65/323; C08G65/3233; C08G65/3236; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/06; C10M2213/00; C10M2213/04; C10M2213/06; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS OF PREPARING PERFLUOROOLEFIN EPOXIDE POLYETHERS HAVING FLUOROCARBON END GROUS WHICH COMPRISES HEATING A PERFLUORINATED ACID HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
21 words
A PROCESS OF PREPARING PERFLUOROOLEFIN EPOXIDE POLYETHERS HAVING FLUOROCARBON END GROUS WHICH COMPRISES HEATING A PERFLUORINATED ACID HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2500388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |