US2670338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-hardening plastic compositions and solid porous bodies prepared thereform
Assignee: Dow Chemical Co
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Filing: 1951-03-24
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Granted: 1954-02-23
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Expires: 1971-03-24
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Edmunds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PLASTIC COMPOSITION, HAVING A PROPERTY OF HARDENING AT ROOM TEMPERTURE TO FORM A RIGID, POROUS, ACID-RESISTANT ARTICLE, WHICH COMPOSITION COMPRISES A MASS OF CALCINED PETROLEUM COKE GRANULES HAVING OUTER SURFACES THEREOF WETTED WITH A MIXTURE OF A LIQUID, THERMOSETTING PHENOLFORMALDEHYDE CONDENSATION PRODUCT, A RESINHARDENING CATALYST COMPRISING AT LEAST 40 PER CENT BY WEIGHT OF BENZENE SULPHONYL CHLORIDE AND A SUBSTANTIALLY INERT, FINELY DIVIDED FILLER IN AMOUNT SUFFICIENT TO THICKEN THE LIQUID PHENOLFORMALDEHYDE CONDENSATION PRODUCT AND THUS LIMIT ABSORPTUON OF THE SAME BY THE COKE GRANULES, SAID PHENOL-FORMALDEHYDE CONDENSATION PRODUCT BEING PRESENT IN AMOUNT SUFFICIENT FOR SURFACE-WETTING OF THE CALCINED PETROLEUM COKE GRANULES, BUT INSUFFICIENT TO FILL COMPLETELY THE INTERSTICES BETWEEN SAID GRANULES.
Claim 2
Dependent Claim
113 words
A PLASTIC COMPOSITION, HAVING A PROPERTY OF HARDENING AT ROOM TEMPERTURE TO FORM A RIGID, POROUS, ACID-RESISTANT ARTICLE, WHICH COMPOSITION COMPRISES A MASS OF CALCINED PETROLEUM COKE GRANULES HAVING OUTER SURFACES THEREOF WETTED WITH A MIXTURE OF A LIQUID, THERMOSETTING PHENOLFORMALDEHYDE CONDENSATION PRODUCT, A RESINHARDENING CATALYST COMPRISING AT LEAST 40 PER CENT BY WEIGHT OF BENZENE SULPHONYL CHLORIDE AND A SUBSTANTIALLY INERT, FINELY DIVIDED FILLER IN AMOUNT SUFFICIENT TO THICKEN THE LIQUID PHENOLFORMALDEHYDE CONDENSATION PRODUCT AND THUS LIMIT ABSORPTUON OF THE SAME BY THE COKE GRANULES, SAID PHENOL-FORMALDEHYDE CONDENSATION PRODUCT BEING PRESENT IN AMOUNT SUFFICIENT FOR SURFACE-WETTING OF THE CALCINED PETROLEUM COKE GRANULES, BUT INSUFFICIENT TO FILL COMPLETELY THE INTERSTICES BETWEEN SAID GRANULES.
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |