Patent US2806832A successfully refreshed from Google Patents.
US2806832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell molding compositions and process for preparing same
Assignee: Monsanto Chemicals Ltd
•
Filing: 1954-05-19
•
Granted: 1957-09-17
•
Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Manuel F Drumm
- 👤 William D Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
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
137 words
A FREE-FLOWING SHELL MOLDING COMPOSITION COMPRISING AN INTIMATE BLEND OF ABOUT 100 PARTS BY WEIGHT OF SAND, ABOUT 1-5 PARTS BY WEIGHT OF PHENOLIC RESIN SOLIDS AND ABOUT 1.5-5%, BASED ON THE WEIGHT OF THE PHENOLIC RESIN OF AN AMIDE, SAID RESIN AND SAID AMIDE BEING PRESENT IN SAID COMPOSITION IN ADMIXTURE AS A HOMOGENEOUS COATING ON THE INDIVIDUAL SAND GRAINS, SAID PHENOLIC RESIN BEING TAKEN FROM THE GROUP CONSISTING OF (1) ONE-STAGE RESINS PREPARED BY REACTING 0.7-2 MOLS OF FORMALDEHYDE WITH 1 MOL OF PHENOL UNDER ALKALINE CONDITIONS AND (2) PERMANENTLY FUSIBLE RESINS PREPARED BY REACTING 1 MOL OF PHENOL WITH LESS THAN 1 MOL OF FORMALDEHYDE UNDER ACID CONDITIONS, SAID AMIDE HAVING THE FORMULA R-CONHR'', WHEREIN R IS AN ALKYL RADICAL HAVING 1-5 CARBON ATOMS AND R'' IS AN ALKYL RADICAL HAVING 14-18 CARBON ATOMS.
Claim 2
Dependent Claim
137 words
A FREE-FLOWING SHELL MOLDING COMPOSITION COMPRISING AN INTIMATE BLEND OF ABOUT 100 PARTS BY WEIGHT OF SAND, ABOUT 1-5 PARTS BY WEIGHT OF PHENOLIC RESIN SOLIDS AND ABOUT 1.5-5%, BASED ON THE WEIGHT OF THE PHENOLIC RESIN OF AN AMIDE, SAID RESIN AND SAID AMIDE BEING PRESENT IN SAID COMPOSITION IN ADMIXTURE AS A HOMOGENEOUS COATING ON THE INDIVIDUAL SAND GRAINS, SAID PHENOLIC RESIN BEING TAKEN FROM THE GROUP CONSISTING OF (1) ONE-STAGE RESINS PREPARED BY REACTING 0.7-2 MOLS OF FORMALDEHYDE WITH 1 MOL OF PHENOL UNDER ALKALINE CONDITIONS AND (2) PERMANENTLY FUSIBLE RESINS PREPARED BY REACTING 1 MOL OF PHENOL WITH LESS THAN 1 MOL OF FORMALDEHYDE UNDER ACID CONDITIONS, SAID AMIDE HAVING THE FORMULA R-CONHR'', WHEREIN R IS AN ALKYL RADICAL HAVING 1-5 CARBON ATOMS AND R'' IS AN ALKYL RADICAL HAVING 14-18 CARBON ATOMS.
References Cited (Backward Citations)
US2662067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |