Patent US2869191A successfully refreshed from Google Patents.
US2869191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising sand, phenolic resin and anhydrous sodium carbonate, method of making and refractory article produced
Assignee: Dow Chemical Co
•
Filing: 1956-09-26
•
Granted: 1959-01-20
•
Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Ronald H Cooper
- 👤 Gerald M Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:54
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
COMPOSITION FOR THE FABRICATION OF POROUS REFRACTORY STRUCTURES WHICH CONSISTS OF A PREPONDERANT PROPORTION OF RELATIVELY COARSE SAND; BETWEEN ABOUT 3 AND 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AQUEOUS PHENOLIC RESIN LIQUID BINDER THAT IS CATALYZED WITH FROM 10 TO 25 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN IN THE COMPOSITION, OF AN ACTIVE POWDERED MAGNESIUM OXIDE CATALYST HAVING AN INITIAL SETTING TIME OF LESS THAN ABOUT SIX HOURS, SAID RESIN BEING A PHENOL-FORMALDEHYDE CONDENSATION PRODUCT THAT HAS A GREATER THAN 1:1 MOLE RATIO OF FORMALDEHYDE TO PHENOL, RESPECTIVELY, A SOLIDS CONTENT OF AT LEAST ABOUT 50 PERCENT BY WEIGHT, A PH BETWEEN ABOUT 5 AND 9 AND A VISCOSITY AT 77* F. OF BETWEEN ABOUT 100 AND 1000 CENTIPOISES; AND BETWEEN ABOUT 10 AND 25 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN IN THE COMPOSITION, OF ANHYDROUS SODIUM CARBONATE.
Claim 2
Dependent Claim
153 words
COMPOSITION FOR THE FABRICATION OF POROUS REFRACTORY STRUCTURES WHICH CONSISTS OF A PREPONDERANT PROPORTION OF RELATIVELY COARSE SAND; BETWEEN ABOUT 3 AND 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AQUEOUS PHENOLIC RESIN LIQUID BINDER THAT IS CATALYZED WITH FROM 10 TO 25 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN IN THE COMPOSITION, OF AN ACTIVE POWDERED MAGNESIUM OXIDE CATALYST HAVING AN INITIAL SETTING TIME OF LESS THAN ABOUT SIX HOURS, SAID RESIN BEING A PHENOL-FORMALDEHYDE CONDENSATION PRODUCT THAT HAS A GREATER THAN 1:1 MOLE RATIO OF FORMALDEHYDE TO PHENOL, RESPECTIVELY, A SOLIDS CONTENT OF AT LEAST ABOUT 50 PERCENT BY WEIGHT, A PH BETWEEN ABOUT 5 AND 9 AND A VISCOSITY AT 77* F. OF BETWEEN ABOUT 100 AND 1000 CENTIPOISES; AND BETWEEN ABOUT 10 AND 25 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN IN THE COMPOSITION, OF ANHYDROUS SODIUM CARBONATE.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |