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Patent US3052704A successfully refreshed from Google Patents.
US3052704A
Expired / Lapsed
US
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Polycyclic fused ring ferrous group metal compounds
Assignee: EIDP Inc
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Filing: 1953-06-15
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Granted: 1962-09-04
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Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 Richard E Benson
- 👤 John C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:50
CPC Classifications
C; C07; C07F; C07F17/00; C07F17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A POLYCYCLIC FUSED RING FERROUS GROUP METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIFLUORENYLIRON, DIFLUORENYLCOBALT, DIFLUORENYLNICKEL, AND HYDROCARBON AND ALKOXY RING-SUBSTITUTED DERIVATIVES THEREOF, SAID HYDROCARBON SUBSTITUTES CONTAINING NO MORE THAN SIX CARBON ATOMS AND SAID ALKOXY SUBSTITUENTS CONTAINING NO MORE THAN TWO CARBON ATOMS.
Claim 2
Dependent Claim
45 words
A POLYCYCLIC FUSED RING FERROUS GROUP METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIFLUORENYLIRON, DIFLUORENYLCOBALT, DIFLUORENYLNICKEL, AND HYDROCARBON AND ALKOXY RING-SUBSTITUTED DERIVATIVES THEREOF, SAID HYDROCARBON SUBSTITUTES CONTAINING NO MORE THAN SIX CARBON ATOMS AND SAID ALKOXY SUBSTITUENTS CONTAINING NO MORE THAN TWO CARBON ATOMS.
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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |