Patent US6175154B1 successfully refreshed from Google Patents.
US2879302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfluoroperhaloethylenediphosphines
Assignee: EIDP Inc
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Filing: 1957-08-21
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Granted: 1959-03-24
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Expires: 1977-08-21
Abstract
No abstract record available.
Inventors
- 👤 David C England
- 👤 George W Parshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:42
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
POLYFLUOROPERHALOETHYLENE-1,2-DIPHOSPHINES WHEREIN THE TWO CARBON ATOMS CARRY AT LEAST TWO FLUORINE ATOMS AND THE REMAINING TWO VALENCES OF SAID CARBON ATOMS BEING SATISFIED BY HALOGENS OF ATOMIC NUMBER NO GREATER THAN 35.
Claim 2
Dependent Claim
32 words
POLYFLUOROPERHALOETHYLENE-1,2-DIPHOSPHINES WHEREIN THE TWO CARBON ATOMS CARRY AT LEAST TWO FLUORINE ATOMS AND THE REMAINING TWO VALENCES OF SAID CARBON ATOMS BEING SATISFIED BY HALOGENS OF ATOMIC NUMBER NO GREATER THAN 35.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |