US3053778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam resistant to discoloration and process for making same
Assignee: Honeywell International Inc
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Filing: 1959-12-09
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Granted: 1962-09-11
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Expires: 1979-12-09
Abstract
No abstract record available.
Inventors
- 👤 Gilbert C Toone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08K; C08K3/00; C08K3/30; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAM INVOLVING THE REACTION OF AN ORGANIC POLYISOCYANATE WITH A POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYESTER AND A POLYETHER HAVING PREDOMINANTLY TERMINAL HYDROXYL GROUPS AND A MONOBASIC FATTY ACID TRIGLYCERIDE HAVING A HYDROXYL NUMBER OF AT LEAST 50, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE REACTANTS PRIOR TO FOAM FORMATION ABOUT 0.1% TO 5% BY WEIGH OF A DISCOLORATION AGENT WHICH IS A WATER-SOLUBLE SALT IN WHICH THE ANION IS SELECTED FROM THE GROUP CONSISTING OF SULFITE, BISULFITE, HYDROSULFATE AND THIOSULFATE AND IN WHICH THE CATION IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM TO RETARD DISCOLORATION OF THE POLYURETHANE FOAM.
Claim 2
Dependent Claim
115 words
IN A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAM INVOLVING THE REACTION OF AN ORGANIC POLYISOCYANATE WITH A POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYESTER AND A POLYETHER HAVING PREDOMINANTLY TERMINAL HYDROXYL GROUPS AND A MONOBASIC FATTY ACID TRIGLYCERIDE HAVING A HYDROXYL NUMBER OF AT LEAST 50, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE REACTANTS PRIOR TO FOAM FORMATION ABOUT 0.1% TO 5% BY WEIGH OF A DISCOLORATION AGENT WHICH IS A WATER-SOLUBLE SALT IN WHICH THE ANION IS SELECTED FROM THE GROUP CONSISTING OF SULFITE, BISULFITE, HYDROSULFATE AND THIOSULFATE AND IN WHICH THE CATION IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM TO RETARD DISCOLORATION OF THE POLYURETHANE FOAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |