US2977330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyalkylene-etherglycolorganic diisocyanate reaction product and method of preparing same
Assignee: Dow Chemical Co
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Filing: 1957-12-05
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Granted: 1961-03-28
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Expires: 1977-12-05
Abstract
No abstract record available.
Inventors
- 👤 Frank M Brower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4825; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S528/00; Y10S528/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF MAKING A FORAMINOUS POLYURETHAN COMPOSITION HAVING PREDOMINANTLY INTERCONNECTING CELLS, WHICH METHOD COMPRISES REACTING (A) AN ORGANIC DIISOCYANATE COMPOUND IN WHICH THE TWO ISOCYANATE RADICALS ARE THE ONLY GROUPS REACTIVE WITH HYDROXYL RADICALS AND (B) A POLYALKYLENE ETHER GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 500 TO 10,000, THE ORGANIC DIISOCYANATE COMPOUND BEING PRESENT IN AMOUNT CORRESPONDING TO FROM 15 TO 50 PERCENT BY WEIGHT OF THE RESULTING MIXTURE OF (A) AND (B) AND TO AT LEAST TWO MOLES THEREOF PER MOLE OF THE POLYALKYLENE ETHER GLYCOL, CONTUINING THE REACTION BETWEEN THE POLYALKYLENE ETHER GLYCOL AND THE ORGANIC DIISOCYANATE COMPOUND UNTIL THE VISCOSITY OF THE REACTING MIXTURE CORRESPONDS TO FROM 4000 TO 20,000 CENTIPOISES, THEREUPON INTIMATELY MIXING WITH THE REACTING MIXTURE, WHILE THE VISCOSITY THEREOF CORRESPONDS TO FROM 4000 TO 20,000 CENTIPOISES, (C) WATER IN AN AMOUNT CORRESPONDING TO AT LEAST ONE MOLE THEREOF PER MOLE OF UNREACTED ORGANIC DIISOCYANATE COMPOUND IN THE REACTING MIXTURE AND TO NOT MORE THAN 20 PERCENT BY WEIGHT OF THE REACTING MIXTURE, AND ALLOWING THE RESULTING REACTION MIXTURE TO FOAM.
Claim 2
Independent Claim
179 words
A METHOD OF MAKING A FORAMINOUS POLYURETHAN COMPOSITION HAVING PREDOMINANTLY INTERCONNECTING CELLS, WHICH METHOD COMPRISES REACTING (A) AN ORGANIC DIISOCYANATE COMPOUND IN WHICH THE TWO ISOCYANATE RADICALS ARE THE ONLY GROUPS REACTIVE WITH HYDROXYL RADICALS AND (B) A POLYALKYLENE ETHER GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 500 TO 10,000, THE ORGANIC DIISOCYANATE COMPOUND BEING PRESENT IN AMOUNT CORRESPONDING TO FROM 15 TO 50 PERCENT BY WEIGHT OF THE RESULTING MIXTURE OF (A) AND (B) AND TO AT LEAST TWO MOLES THEREOF PER MOLE OF THE POLYALKYLENE ETHER GLYCOL, CONTUINING THE REACTION BETWEEN THE POLYALKYLENE ETHER GLYCOL AND THE ORGANIC DIISOCYANATE COMPOUND UNTIL THE VISCOSITY OF THE REACTING MIXTURE CORRESPONDS TO FROM 4000 TO 20,000 CENTIPOISES, THEREUPON INTIMATELY MIXING WITH THE REACTING MIXTURE, WHILE THE VISCOSITY THEREOF CORRESPONDS TO FROM 4000 TO 20,000 CENTIPOISES, (C) WATER IN AN AMOUNT CORRESPONDING TO AT LEAST ONE MOLE THEREOF PER MOLE OF UNREACTED ORGANIC DIISOCYANATE COMPOUND IN THE REACTING MIXTURE AND TO NOT MORE THAN 20 PERCENT BY WEIGHT OF THE REACTING MIXTURE, AND ALLOWING THE RESULTING REACTION MIXTURE TO 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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |