Patent US2890128A successfully refreshed from Google Patents.
US2890128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonaceous cement
Assignee: Union Carbide Corp
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Filing: 1954-03-24
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Granted: 1959-06-09
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Expires: 1974-03-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond M Bushong
- 👤 Charles W Clark
- 👤 Frank P Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CARBONIZABLE CEMENT COMPOSED OF 25% TO 40% PITCH HAVING A MELTING POINT OF AT LEAST 130*C., 10% TO 40% OF A TEMPORARY BINDER COMPOSED OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM SILICATE, POTASSIUM SILICATE AND CLAY, AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MOLASSES, WOOD LIGNIN AND WHEAT PASTE, SAID BINDER HAVING THE PROPERTY OF STIFFENING AT A TEMPERATURE SUBSTANTIALLY BELOW THE MELTING POINT OF SAID PITCH AND THEREBY SERVING TO HOLD SAID CEMENT IN PLACE AND TO FORM A MATRIX FOR RETENTION OF SAID PITCH DURING CARBONIZATION THEREOF, SAID PITCH BEING INSOLUBLE IN SAID TEMPORARY BINDER; THE MATERIAL SELECTED FROM SAID FIRST-MENTIONED GROUP BEING PRESENT IN SAID CEMENT IN A PROPORTION BETWEEN 3% AND 35% OF SAID CEMENT BY WEIGHT, AND THE MATERIAL SELECTIVE FROM SAID SECOND-MENTIONED GROUP BEING PRESENT IN SAID CEMENT IN A PROPORTION OF 5% TO 30% OF SAID CEMENT BY WEIGHT; THE REMAINDER OF SAID CEMENT BEING FINELY-DIVIDED CARBON PLUS SUFFICIENT WATER TO RENDER THE SAME OF TROWELLABLE CONSISTENCY.
Claim 2
Dependent Claim
174 words
A CARBONIZABLE CEMENT COMPOSED OF 25% TO 40% PITCH HAVING A MELTING POINT OF AT LEAST 130*C., 10% TO 40% OF A TEMPORARY BINDER COMPOSED OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM SILICATE, POTASSIUM SILICATE AND CLAY, AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MOLASSES, WOOD LIGNIN AND WHEAT PASTE, SAID BINDER HAVING THE PROPERTY OF STIFFENING AT A TEMPERATURE SUBSTANTIALLY BELOW THE MELTING POINT OF SAID PITCH AND THEREBY SERVING TO HOLD SAID CEMENT IN PLACE AND TO FORM A MATRIX FOR RETENTION OF SAID PITCH DURING CARBONIZATION THEREOF, SAID PITCH BEING INSOLUBLE IN SAID TEMPORARY BINDER; THE MATERIAL SELECTED FROM SAID FIRST-MENTIONED GROUP BEING PRESENT IN SAID CEMENT IN A PROPORTION BETWEEN 3% AND 35% OF SAID CEMENT BY WEIGHT, AND THE MATERIAL SELECTIVE FROM SAID SECOND-MENTIONED GROUP BEING PRESENT IN SAID CEMENT IN A PROPORTION OF 5% TO 30% OF SAID CEMENT BY WEIGHT; THE REMAINDER OF SAID CEMENT BEING FINELY-DIVIDED CARBON PLUS SUFFICIENT WATER TO RENDER THE SAME OF TROWELLABLE CONSISTENCY.
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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) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |