Patent US3255126A successfully refreshed from Google Patents.
US3255126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam prepared from a halogen containing polyether
Assignee: Olin Corp
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Filing: 1962-03-23
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Granted: 1966-06-07
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Expires: 1982-03-23
Abstract
No abstract record available.
Inventors
- 👤 Fuzesi Stephen
- 👤 Perico Francisco Alberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A POLYURETHANE FOAM PREPARED BY THE PROCESS WHICH COMPRISES REACTING TOGETHER (1) THE HALOGEN-CONTAINING ADDUCT OBTAINED BY REACTING A MIXTURE OF POLYHYDRIC ALCHOLS, ONE OF SAID POLYHYDRIC ALCOHOLS BEING STARCH AND ONE OF SAID POLYHYDRIC ALOCOHOLS BEING A POLYHYDRIC ALCOHOL OTHER THAN STARCH, TO OBTAIN A REACTION PRODUCT, AND REACTING WITH SAID REACTION PRODUCT AN EPIHALOHYDRIN SELECTED FROM THE GOUP CONSISTING OF EPICHLOROHYDRIN AND EPIBROMOHYDRIN IN THE PRESENCE OF AN ACIDIC CATALYST, SAID ADDUCT HAVING A HYDROXYL NUMBER BETWEEN 30 AND 800, (2) AN ORGANIC POLYISOCYANATE IN AN AMOUNT OF AT LEAST 0.7 NCO GROUPS BASED ON THE NUMBER OF HYDROXYL GROUPS PRESENT, IN THE PRESENCE OF (3) A FOAMING AGENT AND (4) A REACTION CATALYST.
Claim 2
Dependent Claim
116 words
A POLYURETHANE FOAM PREPARED BY THE PROCESS WHICH COMPRISES REACTING TOGETHER (1) THE HALOGEN-CONTAINING ADDUCT OBTAINED BY REACTING A MIXTURE OF POLYHYDRIC ALCHOLS, ONE OF SAID POLYHYDRIC ALCOHOLS BEING STARCH AND ONE OF SAID POLYHYDRIC ALOCOHOLS BEING A POLYHYDRIC ALCOHOL OTHER THAN STARCH, TO OBTAIN A REACTION PRODUCT, AND REACTING WITH SAID REACTION PRODUCT AN EPIHALOHYDRIN SELECTED FROM THE GOUP CONSISTING OF EPICHLOROHYDRIN AND EPIBROMOHYDRIN IN THE PRESENCE OF AN ACIDIC CATALYST, SAID ADDUCT HAVING A HYDROXYL NUMBER BETWEEN 30 AND 800, (2) AN ORGANIC POLYISOCYANATE IN AN AMOUNT OF AT LEAST 0.7 NCO GROUPS BASED ON THE NUMBER OF HYDROXYL GROUPS PRESENT, IN THE PRESENCE OF (3) A FOAMING AGENT AND (4) A REACTION CATALYST.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |