US2763700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sodium derivatives of weakly acidic hydrocarbons
Assignee: EIDP Inc
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Filing: 1952-10-01
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Granted: 1956-09-18
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Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles L Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:51
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/04; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PREPARATION OF A SODIUM DERIVATIVE OF A HYDROCARBON CONTAINING THE CYCLOPENTADIENE NUCLEUS AND BEING AT LEAST AS ACIDIC AS FLUORENE WHICH COMPRISES EFFECTING REACTION BETWEEN THE SAID HYDROCARBON AND SODIUM ACETYLIDE BY BRINGING THE REACTANTS INTO CONTACT WITH ONE ANOTHER IN A LIQUID MEDIUM WHICH IS INERT WITH RESPECT TO THE SAID REACTANTS.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PREPARATION OF A SODIUM DERIVATIVE OF A HYDROCARBON CONTAINING THE CYCLOPENTADIENE NUCLEUS AND BEING AT LEAST AS ACIDIC AS FLUORENE WHICH COMPRISES EFFECTING REACTION BETWEEN THE SAID HYDROCARBON AND SODIUM ACETYLIDE BY BRINGING THE REACTANTS INTO CONTACT WITH ONE ANOTHER IN A LIQUID MEDIUM WHICH IS INERT WITH RESPECT TO THE SAID REACTANTS.
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |