Patent US1456966A successfully refreshed from Google Patents.
Patent US2863889A successfully refreshed from Google Patents.
US2863889A
Expired / Lapsed
US
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Method for recovering fluorinated stabilizer
Assignee: EIDP Inc
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Filing: 1956-09-18
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Granted: 1958-12-09
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Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Marks Barnard Mitchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:00
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C07C51/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PROCESS FOR SEPARATING THE AMMONIUM SALT OF A FLUOROALKANOIC ACID HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A PROCESS FOR SEPARATING THE AMMONIUM SALT OF A FLUOROALKANOIC ACID HAVING THE GENERAL FORMULA
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |