US2640787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbonaceous molding compositions
Assignee: CD Patents Ltd
•
Filing: 1948-10-11
•
Granted: 1953-06-02
•
Expires: 1968-10-11
Abstract
No abstract record available.
Inventors
- 👤 Greaves Charles Desmond
- 👤 Parker William Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C04B35/66; C08; C08L; C08L95/00; C10; C10L; C10L5/00; C10L5/02; C10L5/06; C10L5/10; C10L5/14; C10L5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE MANUFACTURE OF A DOUGHLIKE EXTRUSIBLE COMPOSITION CONSISTING MAINLY OF COAL FROM NON-BITUMINOUS, NON-AGGLUTINATING COAL, WHICH PROCESS COMPRISES MIXING THE COAL, 95% OF WHICH PASSES A 200 MESH SIEVE, WITH A RELATIVELY HIGH BOILING SOFTENING AGENT IN THE AMOUNT OF 10% TO 30% BY WEIGHT OF THE MIXTURE, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN 60* C. AND 180* C., DIGESTING THE MIXTURE WITH CONTINUED MIXING FOR BETWEEN 2 AND 8 HOURS, ALLOWING THE MIXTURE TO COOL AND THEREAFTER ADDING AND MIXING A SOLVENT HAVING A LOWER BOILING POINT THAN SAID SOFTENING AGENT TO REDUCE THE CONSISTENCY OF SAID MIXTURE, WHICH SOLVENT IS NON-REACTIVE WITH THE AFORESAID MIXTURE AND IS PRESENT IN A WEIGHT LESS THAN THAT OF THE SOFTENING AGENT.
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE MANUFACTURE OF A DOUGHLIKE EXTRUSIBLE COMPOSITION CONSISTING MAINLY OF COAL FROM NON-BITUMINOUS, NON-AGGLUTINATING COAL, WHICH PROCESS COMPRISES MIXING THE COAL, 95% OF WHICH PASSES A 200 MESH SIEVE, WITH A RELATIVELY HIGH BOILING SOFTENING AGENT IN THE AMOUNT OF 10% TO 30% BY WEIGHT OF THE MIXTURE, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN 60* C. AND 180* C., DIGESTING THE MIXTURE WITH CONTINUED MIXING FOR BETWEEN 2 AND 8 HOURS, ALLOWING THE MIXTURE TO COOL AND THEREAFTER ADDING AND MIXING A SOLVENT HAVING A LOWER BOILING POINT THAN SAID SOFTENING AGENT TO REDUCE THE CONSISTENCY OF SAID MIXTURE, WHICH SOLVENT IS NON-REACTIVE WITH THE AFORESAID MIXTURE AND IS PRESENT IN A WEIGHT LESS THAN THAT OF THE SOFTENING AGENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |