Patent US2852542A successfully refreshed from Google Patents.
US2852542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylated metallo-organic compounds and their preparation
Assignee: Texaco Inc
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Filing: 1956-02-29
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Granted: 1958-09-16
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 William M Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:02
CPC Classifications
C; C07; C07F; C07F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR MAKING A POLYACETYL DICYCLOPENTADIENYL IRON COMPOUND HAVING 3 TO 4 ACETYL GROUPS ATTACHED TO NUCLEAR CARBON ATOMS WHICH COMPRISES: FORMING A REACTION MIXTURE OF A HICYCLOPENTADIENYL IRON COMPOUND, SAID COMPOUND HAVING NOT MORE THAN TWO ACETYL GROUPS ATTACHED TO NUCLEAR CARBON ATOMS, AND ACETIC ANHYDRIDE IN EXCESS OF THE STOICHIOMETRIC AMOUNT NECESSARY FOR FORMATION OF SAID POLYACETYL COMPOUND; HEATING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN 200* AND 350* F. IN THE PRESENCE OF TRIFLUOROACETIC ACID UNTIL SAID POLYACETYL COMPOUND IS FORMED; AND SEPARATING SAID POLYACETYL COMPOUND FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
94 words
A PROCESS FOR MAKING A POLYACETYL DICYCLOPENTADIENYL IRON COMPOUND HAVING 3 TO 4 ACETYL GROUPS ATTACHED TO NUCLEAR CARBON ATOMS WHICH COMPRISES: FORMING A REACTION MIXTURE OF A HICYCLOPENTADIENYL IRON COMPOUND, SAID COMPOUND HAVING NOT MORE THAN TWO ACETYL GROUPS ATTACHED TO NUCLEAR CARBON ATOMS, AND ACETIC ANHYDRIDE IN EXCESS OF THE STOICHIOMETRIC AMOUNT NECESSARY FOR FORMATION OF SAID POLYACETYL COMPOUND; HEATING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN 200* AND 350* F. IN THE PRESENCE OF TRIFLUOROACETIC ACID UNTIL SAID POLYACETYL COMPOUND IS FORMED; AND SEPARATING SAID POLYACETYL COMPOUND FROM THE REACTION MIXTURE.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |