US2734800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brooks
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:57
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/20; C01B32/21; C01B32/215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PURIFYING GRAPHITE WHICH COMPRISES THE STEPS OF SUBJECTING THE IMPURE GRAPHITE AT ELEVATED TEMPERATURES AND UP TO AT LEAST 1860* C. TO THE ACTION OF A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FULLY CHLORINATED HYDROCARBONS, AND SUBSEQUENTLY, AT A TEMPERATURE GREATER THAN THE TEMPERATURERANGE WITHIN WHICH CARBON AND FLUORINE WILL REACT, SUBJECTING THE GRAPHITE TO THE ACTION OF A FLUORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF FLUORINE, HYDROGEN FLUORIDE AND FULLY HALOGENATED HYDROCARBONS OF WHICH AT LEAST ONE OF THE HALOGENS IS FLUORINE.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PURIFYING GRAPHITE WHICH COMPRISES THE STEPS OF SUBJECTING THE IMPURE GRAPHITE AT ELEVATED TEMPERATURES AND UP TO AT LEAST 1860* C. TO THE ACTION OF A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FULLY CHLORINATED HYDROCARBONS, AND SUBSEQUENTLY, AT A TEMPERATURE GREATER THAN THE TEMPERATURERANGE WITHIN WHICH CARBON AND FLUORINE WILL REACT, SUBJECTING THE GRAPHITE TO THE ACTION OF A FLUORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF FLUORINE, HYDROGEN FLUORIDE AND FULLY HALOGENATED HYDROCARBONS OF WHICH AT LEAST ONE OF THE HALOGENS IS FLUORINE.
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) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |