US3285946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono- and di-(lower alkyl substituted) dicyclopentadienyl iron
Assignee: Ethyl Corp
•
Filing: 1955-11-23
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Granted: 1966-11-15
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Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Witt Earl G De
- 👤 Jerome E Brown
- 👤 Shapiro Hymin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305; C07; C07F; C07F17/00; C07F17/02; C10L1/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
AN UNSYMMETRICAL DI(LOWER ALKYL SUBSTITUTED CYCLOPENTADIENYL) IRON COMPOUND WHEREIN EACH LOWER ALKYL CYCLOPENTADIENYL RADICAL, BY VIRTUE OF DISSIMILAR ALKYL SUBSTITUTION, DIFFERS FROM THE OTHER LOWER ALKYL CYCLOPENTADIENYL RADICAL.
Claim 2
Dependent Claim
28 words
AN UNSYMMETRICAL DI(LOWER ALKYL SUBSTITUTED CYCLOPENTADIENYL) IRON COMPOUND WHEREIN EACH LOWER ALKYL CYCLOPENTADIENYL RADICAL, BY VIRTUE OF DISSIMILAR ALKYL SUBSTITUTION, DIFFERS FROM THE OTHER LOWER ALKYL CYCLOPENTADIENYL RADICAL.
Claim 3
Dependent Claim
21 words
A (LOWER ALKYL-SUBSTITUTED DICYCLOPENTADIENYL) IRON IN WHICH ONLY ONE CYCLOPENTADIENYL GROUP IS SUBSTITUTED, SAID LOWER ALKYL GROUP BEING THE SOLE SUBSTITUENT.
Claim 4
Dependent Claim
21 words
A (LOWER ALKYL-SUBSTITUTED DICYCLOPENTADIENYL) IRON IN WHICH ONLY ONE CYCLOPENTADIENYL GROUP IS SUBSTITUTED, SAID LOWER ALKYL GROUP BEING THE SOLE SUBSTITUENT.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |