US2512230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joining of carbon bodies to other bodies
Assignee: CD Patents Ltd
•
Filing: 1948-02-02
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Granted: 1950-06-20
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Expires: 1968-02-02
Abstract
No abstract record available.
Inventors
- 👤 Greaves Charles Desmond
- 👤 Walker William Derrick Corlass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B37/00; C04B37/003; C04B37/005; C04B2235/00; C04B2235/60; C04B2235/604; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/08; C04B2237/086; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/72; Y; Y10; Y10S; Y10S285/00; Y10S285/923; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF JOINING A CARBON BODY BY WAY OF A LAYER OF MATERIAL COMPOSED PREDOMINANTLY OF ELEMENTAL CARBON TO ANOTHER BODY HAVING APPROXIMATELY THE SAME COEFFICIENT OF THERMAL EXPANSION AND THE SAME COEFFICIENT OF WETTABILITY AS THE CARBON BODY WHICH METHOD CONSISTS IN PREPARING A PASTE BY MIXING A CYCLIC ORGANIC COMPOUND HAVING NOT LESS THAN 4 CARBON ATOMS IN THE RING AND HAVING A RATIO OF HYDROGEN TO OXYGEN ATOMS SUBSTANTIALLY 2:1 AND SELECTED FROM THE GROUP CONSISTING OF FURFURAL, AND FURFURYL ALCOHOL, QUINONE, PYROGALLOL AND A DERIVATIVE POSSESSING THE CHARACTERISTIC RING STRUCTURE OF SUCH COMPOUNDS WITH FINELY DIVIDED CARBON AND CONCENTRATED SULPHURIC ACID, SPREADING THE PASTE EVENLY ON THE JOINING SURFACES, PRESSING THESE SURFACES TOGETHER AND HEATING THE JOINT SLOWLY UP TO A TEMPERATURE BETWEEN 100*C. AND 300*C.
Claim 2
Independent Claim
131 words
A METHOD OF JOINING A CARBON BODY BY WAY OF A LAYER OF MATERIAL COMPOSED PREDOMINANTLY OF ELEMENTAL CARBON TO ANOTHER BODY HAVING APPROXIMATELY THE SAME COEFFICIENT OF THERMAL EXPANSION AND THE SAME COEFFICIENT OF WETTABILITY AS THE CARBON BODY WHICH METHOD CONSISTS IN PREPARING A PASTE BY MIXING A CYCLIC ORGANIC COMPOUND HAVING NOT LESS THAN 4 CARBON ATOMS IN THE RING AND HAVING A RATIO OF HYDROGEN TO OXYGEN ATOMS SUBSTANTIALLY 2:1 AND SELECTED FROM THE GROUP CONSISTING OF FURFURAL, AND FURFURYL ALCOHOL, QUINONE, PYROGALLOL AND A DERIVATIVE POSSESSING THE CHARACTERISTIC RING STRUCTURE OF SUCH COMPOUNDS WITH FINELY DIVIDED CARBON AND CONCENTRATED SULPHURIC ACID, SPREADING THE PASTE EVENLY ON THE JOINING SURFACES, PRESSING THESE SURFACES TOGETHER AND HEATING THE JOINT SLOWLY UP TO A TEMPERATURE BETWEEN 100*C. AND 300*C.
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) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |