Patent US3898045A successfully refreshed from Google Patents.
Patent US2779689A successfully refreshed from Google Patents.
US2779689A
Expired / Lapsed
US
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Forming foamed polyurethane resins
Assignee: PPG Industries Inc
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Filing: 1955-07-19
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Granted: 1957-01-29
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph J Reis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7438; B29B7/7447; C08J; C08J9/00; C08J9/02; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A METHOD OF FORMING A POLYURETHANE RESIN FOAM UPON A SOLID SURFACE, THE STEPS OF SPRAYING FROM SEPARATE ORIFICES (A) A LIQUID, ANHYDROUS, SPRAYABLE, RELATIVELY STABLE PREPOLYMER OF A DIISOCYANATE AND A POLYESTER OF AN ALCOHOL CONTAINING AT LEAST 2 HYDROYLS AND A DICARBOXYLIC ACID AND (B) AN AQUEOUS DISPERSION OF A POLYESTER WHICH IS ALSO AN ALCOHOL CONTAINING AT LEAST 2 HYDROXYLS AND A DICARBOXYLIC ACID, IMPINGING THE TWO SPRAYS UPON SAID SURFACE AND EFFECTING FOAMING AND CURING OF THE RESULTANT MIXTURE.
Claim 2
Dependent Claim
84 words
IN A METHOD OF FORMING A POLYURETHANE RESIN FOAM UPON A SOLID SURFACE, THE STEPS OF SPRAYING FROM SEPARATE ORIFICES (A) A LIQUID, ANHYDROUS, SPRAYABLE, RELATIVELY STABLE PREPOLYMER OF A DIISOCYANATE AND A POLYESTER OF AN ALCOHOL CONTAINING AT LEAST 2 HYDROYLS AND A DICARBOXYLIC ACID AND (B) AN AQUEOUS DISPERSION OF A POLYESTER WHICH IS ALSO AN ALCOHOL CONTAINING AT LEAST 2 HYDROXYLS AND A DICARBOXYLIC ACID, IMPINGING THE TWO SPRAYS UPON SAID SURFACE AND EFFECTING FOAMING AND CURING OF THE RESULTANT MIXTURE.
References Cited (Backward Citations)
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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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |