Patent US3281379A successfully refreshed from Google Patents.
US3281379A
Expired / Lapsed
US
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Process for making polyurethane foam
Assignee: Dow Chemical Co
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Filing: 1963-11-07
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Granted: 1966-10-25
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Fontaine Lucien Robert
- 👤 Pastor Arthur John
- 👤 Newton Robert Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/14; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08J9/0061; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/09; C08L; C08L63/00; C08L75/00; C08L75/04; C08L75/08; C08L83/00; C08L83/10; C08L83/12; C08J2375/00; C08J2375/04; C08J2375/08; C08J2463/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF MAKING A POLYURETHANE FOAM WHICH COMPRISES REACTING A POLYOL HAVING AN OH EQUIVALENT WEIGHT OF AT LEAST 500, WITH AN ORGANIC POLYSIOCYANATE IN THE PRESENCE OF FROM ABOUT 2 TO ABOUT 40 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLYURETHANE FOAMING MATERIALS OF A VOLATILE CHLORINATED LOWER ALKANE HAVING A BOILING POINT BELOW ABOUT 80*C. AND ABOVE -20* C. AND FROM 0.01 TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID CHLORINATED ALKANE OF AN EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES HAVING FROM 1 TO 18 CARBON ATOMS, BUTYL GLYCIDYL ETHER AND DIGLYCIDYL ETHER OF P,P-ISOPROPYLIDENEDIPHENOL.
Claim 2
Independent Claim
108 words
A METHOD OF MAKING A POLYURETHANE FOAM WHICH COMPRISES REACTING A POLYOL HAVING AN OH EQUIVALENT WEIGHT OF AT LEAST 500, WITH AN ORGANIC POLYSIOCYANATE IN THE PRESENCE OF FROM ABOUT 2 TO ABOUT 40 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLYURETHANE FOAMING MATERIALS OF A VOLATILE CHLORINATED LOWER ALKANE HAVING A BOILING POINT BELOW ABOUT 80*C. AND ABOVE -20* C. AND FROM 0.01 TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID CHLORINATED ALKANE OF AN EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES HAVING FROM 1 TO 18 CARBON ATOMS, BUTYL GLYCIDYL ETHER AND DIGLYCIDYL ETHER OF P,P-ISOPROPYLIDENEDIPHENOL.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |