US2875223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dicyclopentadienyliron derivatives
Assignee: EIDP Inc
•
Filing: 1954-08-18
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Granted: 1959-02-24
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Expires: 1974-08-18
Abstract
No abstract record available.
Inventors
- 👤 Charles J Pedersen
- 👤 Weinmayr Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305; C07; C07F; C07F17/00; C07F17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A DICYCLOPENTADIENYLIRON DERIVATIVE OF THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
A DICYCLOPENTADIENYLIRON DERIVATIVE OF THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |