US2915491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic resins and their use in moulding processes
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-04-30
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Granted: 1959-12-01
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Smith Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:15
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A COMPOSITION FOR USE IN THE SHELL-MOULDING PROCESS CONSISTING OF A DRY MIXTURE OF A FINELY DIVIDED REFRACTORY MATERIAL TAKEN FROM THE GROUP CONSISTING OF SAND, SILLIMANITE AND FIRE CLAY AND FROM 5 TO 15% BY WEIGHT OF A PHENOLIC RESIN PREPARED BY CONDENSING ONE MOL OF PHENOL WITH FROM 1.3 TO 1.5 MOLS OF FORMALDEHYDE IN AN AQUEOUS MEDIUM IN THE PRESENCE OF 0.05-0.35 MOL OF AMMONIA UNDER CONTROLLED EXOTHERMAL CONDITIONS AND THEN FURTHER HEATING THE REACTION MIXTURE UNTIL ON COOLING THE PRECIPITATED LIQUID RESIN SOLIDIFIES.
Claim 2
Dependent Claim
87 words
A COMPOSITION FOR USE IN THE SHELL-MOULDING PROCESS CONSISTING OF A DRY MIXTURE OF A FINELY DIVIDED REFRACTORY MATERIAL TAKEN FROM THE GROUP CONSISTING OF SAND, SILLIMANITE AND FIRE CLAY AND FROM 5 TO 15% BY WEIGHT OF A PHENOLIC RESIN PREPARED BY CONDENSING ONE MOL OF PHENOL WITH FROM 1.3 TO 1.5 MOLS OF FORMALDEHYDE IN AN AQUEOUS MEDIUM IN THE PRESENCE OF 0.05-0.35 MOL OF AMMONIA UNDER CONTROLLED EXOTHERMAL CONDITIONS AND THEN FURTHER HEATING THE REACTION MIXTURE UNTIL ON COOLING THE PRECIPITATED LIQUID RESIN SOLIDIFIES.
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |