Patent US2856440A successfully refreshed from Google Patents.
US2856440A
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Fluorine containing co-telomers
Assignee: EIDP Inc
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Filing: 1955-06-17
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Granted: 1958-10-14
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Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Nikolans E Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:01
CPC Classifications
C; C07; C07C; C07C19/00; C07C19/08; C07C17/00; C07C17/26; C07C17/272; C07C17/278; C08; C08F; C08F214/00; C08F214/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A CO-TELOMER CONTAINING BETWEEN 23% AND 73% BY WEIGHT OF FLUORINE WHICH CONSISTS ESSENTIALLY OF ONE RADICAL OF AN ALKANE OF 4-18 CARBON ATOMS CONTAINING AT LEAST ONE TERTIARY CARBON ATOM FOR EVERY 3-6 NON-TERTIARY CARBON ATOMS AND A POLYMER CHAIN TERMINATED AT ONE END BY A TERTIARY CARBON ATOM OF THE ALKANE RADICAL AND AT THE OTHER END BY HYDROGEN, SAID POLYMER CHAIN CONSISTING OF 2-3 DIFFERENT POLYFLUORO UNITS OF THE STRUCTURE
Claim 2
Dependent Claim
73 words
A CO-TELOMER CONTAINING BETWEEN 23% AND 73% BY WEIGHT OF FLUORINE WHICH CONSISTS ESSENTIALLY OF ONE RADICAL OF AN ALKANE OF 4-18 CARBON ATOMS CONTAINING AT LEAST ONE TERTIARY CARBON ATOM FOR EVERY 3-6 NON-TERTIARY CARBON ATOMS AND A POLYMER CHAIN TERMINATED AT ONE END BY A TERTIARY CARBON ATOM OF THE ALKANE RADICAL AND AT THE OTHER END BY HYDROGEN, SAID POLYMER CHAIN CONSISTING OF 2-3 DIFFERENT POLYFLUORO UNITS OF THE STRUCTURE
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |