Patent US2928865A successfully refreshed from Google Patents.
US2928865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated tricyclononanes and tetracycloundecanes
Assignee: EIDP Inc
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Filing: 1957-03-25
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Granted: 1960-03-15
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Wallace R Brasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:24
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/18; C07C23/20; C07C23/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A COMPOUND OF THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
7 words
A COMPOUND OF THE FOLLOWING STRUCTURAL FORMULA:
Claim 3
Dependent Claim
25 words
THE PREPARATION OF POLYCYCLIC COMPOUNDS WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM 125 TO 250*C. AND UNDER SPERATMOSPHERIC PRESSURE A FLUOROOLEFIN OF THE FORMULA
Claim 4
Dependent Claim
25 words
THE PREPARATION OF POLYCYCLIC COMPOUNDS WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM 125 TO 250*C. AND UNDER SPERATMOSPHERIC PRESSURE A FLUOROOLEFIN OF THE FORMULA
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |