US2957756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filamentary graphite and method for producing the same
Assignee: Union Carbide Corp
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Filing: 1958-03-18
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Granted: 1960-10-25
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Expires: 1978-03-18
Abstract
No abstract record available.
Inventors
- 👤 Bacon Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:35
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/04; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A METHOD FOR PRODUCING FILAMENTARY GRAPHITE COMPRISING CONFINING IN A CLOSED PRESSURE VESSEL HAVING MEANS FOR INTRODUCING INERT GASES THEREIN A GRAPHITE ROD SURMOUNTING A CARBON BLOCK, STRIKING A DIRECT CURRENT ARC BETWEEN SAID ROD AND BLOCK WHILE MAINTAINING THE PRESSURE IN SAID VESSEL BETWEEN 1150 P.S.I. AND 1400 P.S.I., TO EFFECT VAPORIZATION FROM SAID ROD ONTO SAID BLOCK IN THE FORM OF A BOULE, COOLING SAID BOULE, FRACTURING SAID BOULE AND REMOVING GRAPHITE FILAMENTS EMBEDDED THEREIN.
Claim 2
Independent Claim
77 words
A METHOD FOR PRODUCING FILAMENTARY GRAPHITE COMPRISING CONFINING IN A CLOSED PRESSURE VESSEL HAVING MEANS FOR INTRODUCING INERT GASES THEREIN A GRAPHITE ROD SURMOUNTING A CARBON BLOCK, STRIKING A DIRECT CURRENT ARC BETWEEN SAID ROD AND BLOCK WHILE MAINTAINING THE PRESSURE IN SAID VESSEL BETWEEN 1150 P.S.I. AND 1400 P.S.I., TO EFFECT VAPORIZATION FROM SAID ROD ONTO SAID BLOCK IN THE FORM OF A BOULE, COOLING SAID BOULE, FRACTURING SAID BOULE AND REMOVING GRAPHITE FILAMENTS EMBEDDED THEREIN.
Claim 3
Dependent Claim
58 words
SUBSTANTIALLY NONCRYSTALLINE FILAMENTARY GRAPHITE CHARACTERIZED BY A HIGHLY PREFERENTIAL ORIENTATION WHEREIN THE CRYSTALLOGRAPHIC C-AXIS IS EXACTLY PERPENDICULAR TO THE AXIS OF THE FILAMENT, AND A TENSILE STRENGTH OF ABOUT THREE MILLION POUNDS PER SQUARE INCH, AND CONSISTING OF AXIALLY CONTINUOUS SHEETS OF GRAPHITE HAVING AN EXTENSION PERPENDICULAR TO THE FILAMENT AXIS RANGING FROM 0.1 MICRON TO 10 MICRONS.
Claim 4
Dependent Claim
58 words
SUBSTANTIALLY NONCRYSTALLINE FILAMENTARY GRAPHITE CHARACTERIZED BY A HIGHLY PREFERENTIAL ORIENTATION WHEREIN THE CRYSTALLOGRAPHIC C-AXIS IS EXACTLY PERPENDICULAR TO THE AXIS OF THE FILAMENT, AND A TENSILE STRENGTH OF ABOUT THREE MILLION POUNDS PER SQUARE INCH, AND CONSISTING OF AXIALLY CONTINUOUS SHEETS OF GRAPHITE HAVING AN EXTENSION PERPENDICULAR TO THE FILAMENT AXIS RANGING FROM 0.1 MICRON TO 10 MICRONS.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |