US3232893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed polyester-maleic anhydride compositions and method of making the same
Assignee: Reichhold Chemicals Inc
•
Filing: 1962-06-27
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Granted: 1966-02-01
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Salgado Alvaro
- 👤 Berlinger Ismar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/147; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS FOR PRODUCING A CURED RESINOUS FOAM WHICH COMPRISES THE STEPS OF MIXING A VAPORIZABLE BLOWING AGENT COMPRISING A NORMALLY LIQUID, INERT, ORGANIC COMPOUND HAVING A BOILING POINT BETWEEN ABOUT 20*C. TO 60*C. WITH A BLEND OF (A) A MIXTURE COMPRISING (A) AN UNSATURATED POLYESTER RESIN OF (1) POLYHYDRIC ALIPHATIC ALCOHOLS AND (2) DICARBOXYLIC ACIDS, WHEREIN AT LEAST ONE MEMBER CONTAINS ALPHA BETA ETHYLENE UNSATURATION AND (B) AT LEAST ONE POLYMERIZABLE MONOMER CONTAINING CARBON TO CARBON UNSATURATION AND (B) A MEMBER OF A GROUP CONSISTING OF MALEIC ANHYDRIDE MALEIC ACID AND A MONOESTER OF MALEIC ACID AND FUMARIC ACID AND ITS ESTERS AND MIXTURES THEREOF, AND FURTHER INCORPORATING A SURFACE ACTIVE AGENT, A PROMOTER AND A CATALYST, WHEREBY THE BLOWING AGENT VAPORIZES DUE TO THE EXOTHERMIC HEAT OF THE REACTION AND THE MIXTURE EXPANDS AND CURES IN THE EXPANDED CONDITION TO A RESINOUS FOAM.
Claim 2
Dependent Claim
145 words
A PROCESS FOR PRODUCING A CURED RESINOUS FOAM WHICH COMPRISES THE STEPS OF MIXING A VAPORIZABLE BLOWING AGENT COMPRISING A NORMALLY LIQUID, INERT, ORGANIC COMPOUND HAVING A BOILING POINT BETWEEN ABOUT 20*C. TO 60*C. WITH A BLEND OF (A) A MIXTURE COMPRISING (A) AN UNSATURATED POLYESTER RESIN OF (1) POLYHYDRIC ALIPHATIC ALCOHOLS AND (2) DICARBOXYLIC ACIDS, WHEREIN AT LEAST ONE MEMBER CONTAINS ALPHA BETA ETHYLENE UNSATURATION AND (B) AT LEAST ONE POLYMERIZABLE MONOMER CONTAINING CARBON TO CARBON UNSATURATION AND (B) A MEMBER OF A GROUP CONSISTING OF MALEIC ANHYDRIDE MALEIC ACID AND A MONOESTER OF MALEIC ACID AND FUMARIC ACID AND ITS ESTERS AND MIXTURES THEREOF, AND FURTHER INCORPORATING A SURFACE ACTIVE AGENT, A PROMOTER AND A CATALYST, WHEREBY THE BLOWING AGENT VAPORIZES DUE TO THE EXOTHERMIC HEAT OF THE REACTION AND THE MIXTURE EXPANDS AND CURES IN THE EXPANDED CONDITION TO A RESINOUS FOAM.
References Cited (Backward Citations)
GB652770A
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US2577281A
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US2653139A
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |