US2912402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell molding composition comprising thermosetting phenol-formaldehyde resin, coating agent, and sand, and process for making same
Assignee: Occidental Chemical Corp
•
Filing: 1954-09-08
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Granted: 1959-11-10
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Expires: 1974-09-08
Abstract
No abstract record available.
Inventors
- 👤 Frank W Less
- 👤 Eugene C Rocck
- 👤 Jay C Searer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:32
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
82 words
A FREE FLOWING, BLOWABLE MOLD FORMING COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SAND, A MINOR PROPORTION BUT AT LEAST 1% OF A POWDERED PHENOL FORMALDEHYDE THERMOSETTING RESIN, AND A LIQUID COATING AGENT CAUSING THE RESIN TO FORM A SUBSTANTIALLY UNIFORM COATING ABOUT EACH SAND PARTICLE AFTER MIXING, SAID COATING AGENT BEING A LIQUID WHICH IS AN ORGANIC ESTER OF PHOSPHORIC ACID, THE RATIO OF SAID COATING AGENT TO SAID RESIN BEING IN THE RANGE OF 1:10 TO 4:10 BY WEIGHT.
Claim 2
Dependent Claim
82 words
A FREE FLOWING, BLOWABLE MOLD FORMING COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SAND, A MINOR PROPORTION BUT AT LEAST 1% OF A POWDERED PHENOL FORMALDEHYDE THERMOSETTING RESIN, AND A LIQUID COATING AGENT CAUSING THE RESIN TO FORM A SUBSTANTIALLY UNIFORM COATING ABOUT EACH SAND PARTICLE AFTER MIXING, SAID COATING AGENT BEING A LIQUID WHICH IS AN ORGANIC ESTER OF PHOSPHORIC ACID, THE RATIO OF SAID COATING AGENT TO SAID RESIN BEING IN THE RANGE OF 1:10 TO 4:10 BY WEIGHT.
References Cited (Backward Citations)
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Cited
US1856371A
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US2446872A
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US2328622A
Cited
US2435858A
Cited
US2521614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |