US2779689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming foamed polyurethane resins
Assignee: PPG Industries Inc
•
Filing: 1955-07-19
•
Granted: 1957-01-29
•
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 15:20
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)
US2450503A
Cited
US2602783A
Cited
GB700611A
Cited
US2650212A
Cited
GB700617A
Cited
US2657151A
Cited
US2634244A
Cited
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 |