US2869194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auto-hardening phenol-formaldehyde composition and method of preparing shell molds therefrom
Assignee: Dow Chemical Co
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Filing: 1956-09-26
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Granted: 1959-01-20
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Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Ronald H Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
COMPOSITION WHICH COMPRISES BETWEEN ABOUT 2 AND 60 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AQUEOUS PHENOLIC LIQUID RESIN, SAID RESIN BEING AN AQUEOUS PHENOL-FORMALDEHYDE LIQUID RESIN THAT HAS A GREATER THAN 1:1 MOLE RATIO OF FORMALDEHYDE TO PHENOL, A SOLIDS CONTENT OF AT LEAST 50 PERCENT BY WEIGHT, A PH BETWEEN 5 AND 9 AND A VISCOSITY AT 77* F. BETWEEN ABOUT 100 AND 1,000 CENTIPOISES; BETWEEN ABOUT 40 AND 98 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN INERT FILLER MATERIAL; AND BETWEEN ABOUT 1 AND 35 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF RESIN IN SAID COMPOSITION, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF POWDERED MAGNESIUM OXIDE HAVING A SETTING TIME OF LESS THAN ABOUT 6 HOURS, AQUEOUS SLURRIED MAGNESIUM OXYCHLORIDE, AQUEOUS SLURRIED MAGNESIUM OXYSULFATE, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
144 words
COMPOSITION WHICH COMPRISES BETWEEN ABOUT 2 AND 60 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AQUEOUS PHENOLIC LIQUID RESIN, SAID RESIN BEING AN AQUEOUS PHENOL-FORMALDEHYDE LIQUID RESIN THAT HAS A GREATER THAN 1:1 MOLE RATIO OF FORMALDEHYDE TO PHENOL, A SOLIDS CONTENT OF AT LEAST 50 PERCENT BY WEIGHT, A PH BETWEEN 5 AND 9 AND A VISCOSITY AT 77* F. BETWEEN ABOUT 100 AND 1,000 CENTIPOISES; BETWEEN ABOUT 40 AND 98 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN INERT FILLER MATERIAL; AND BETWEEN ABOUT 1 AND 35 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF RESIN IN SAID COMPOSITION, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF POWDERED MAGNESIUM OXIDE HAVING A SETTING TIME OF LESS THAN ABOUT 6 HOURS, AQUEOUS SLURRIED MAGNESIUM OXYCHLORIDE, AQUEOUS SLURRIED MAGNESIUM OXYSULFATE, AND MIXTURES THEREOF.
References Cited (Backward Citations)
GB305237A
Cited
US2662067A
Cited
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 |