Patent US3125540A successfully refreshed from Google Patents.
US3125540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane
Assignee: —
•
Filing: —
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Granted: 1964-03-17
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:21
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/009; C08K; C08K9/00; C08K9/12; C08L; C08L75/00; C08L75/04; C08L75/08; C08L83/00; C08L83/04; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A METHOD FOR THE PRODUCTION OF CELLULAR POLYURETHANE PLASTICS HAVING A POROUS STRUCTURE RESEMBLING THAT OF NATURAL SPONGE WHICH COMPRISIES MIXING A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500 WITH AN ORGANIC POLYISOCYANANTE IN THE PRESENCE OF A BLOWING AGENT SUBSTANTIALLY SIMULTANEOUSLY IN ONE STEP IN THE PRESENCE OF FROM ABOUT 0.001 PERCENT TO ABOUT 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID POLYHYDRIC POLYALKYLENE ETHER OF A POLYSILOXANE CONSISTING OF RECURRING STRUCTURAL UNITS OF THE FORMULA $O-SI(R)2$ WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS, NOT MORE THAN BOUT 50 PERCENT BY WEIGHT OF THE POLYSILOXANE BEING SAID ARYL RADICALS, SAID POLYSILOXANE BEING SORBED ON A CARRIER WHICH IS SUBSTANTIALLY INSOLUBLE IN THE POLYHYDRIC POLYALKYLENE ETHER AND HAVING A VISCOSITY WITHIN THE RANGE OF FROM ABOUT 0.5 TO ABOUT 25,000 CENTISTOKES AT 25*C. AND A WATER SOLUBLE SILICONE ALKYLENE OXIDE COPOLYMER AND ALLOWING THE RESULTING MIXTURE TO FOAM TO FORM SAID CELLUCLAR POLYURETHANE PLASTIC.
Claim 2
Independent Claim
167 words
A METHOD FOR THE PRODUCTION OF CELLULAR POLYURETHANE PLASTICS HAVING A POROUS STRUCTURE RESEMBLING THAT OF NATURAL SPONGE WHICH COMPRISIES MIXING A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500 WITH AN ORGANIC POLYISOCYANANTE IN THE PRESENCE OF A BLOWING AGENT SUBSTANTIALLY SIMULTANEOUSLY IN ONE STEP IN THE PRESENCE OF FROM ABOUT 0.001 PERCENT TO ABOUT 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID POLYHYDRIC POLYALKYLENE ETHER OF A POLYSILOXANE CONSISTING OF RECURRING STRUCTURAL UNITS OF THE FORMULA $O-SI(R)2$ WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS, NOT MORE THAN BOUT 50 PERCENT BY WEIGHT OF THE POLYSILOXANE BEING SAID ARYL RADICALS, SAID POLYSILOXANE BEING SORBED ON A CARRIER WHICH IS SUBSTANTIALLY INSOLUBLE IN THE POLYHYDRIC POLYALKYLENE ETHER AND HAVING A VISCOSITY WITHIN THE RANGE OF FROM ABOUT 0.5 TO ABOUT 25,000 CENTISTOKES AT 25*C. AND A WATER SOLUBLE SILICONE ALKYLENE OXIDE COPOLYMER AND ALLOWING THE RESULTING MIXTURE TO FOAM TO FORM SAID CELLUCLAR POLYURETHANE PLASTIC.
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) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |