US3226345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a cellular polyurethane
Assignee: Monsanto Co
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Filing: 1962-12-03
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Granted: 1965-12-28
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 James H Saunders
- 👤 Herbert L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3876; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/16; C08G18/18; C08G18/1875; C08G18/22; C08G18/225; C08G18/26; C08G18/32; C08G18/3271; C08G18/3278; C08G18/3281; C08G18/36; C08G18/40; C08G18/48; C08G18/4829; C08G18/4833; C08G18/60; C08G18/62; C08G18/6287; C08G18/64; C08G18/6415; C08G18/6446; C08G18/6484; C08G18/67; C08G18/675; C09; C09J; C09J175/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD FOR MAKING A CELLULAR POLYURETHANE WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A POLYALKYLENE ETHER POLYHYDRIC ALCOHOL WITH AN ORGANIC POLYISOCYANATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND CURING THE REACTON PRODUCT WITH A CATALYTIC AMOUNT OF A CATALYST WHICH CAUSES PORE FORMATION IN THE CURED PRODUCT, SAID CATALYST BEING SELECTED FROM THE CLASS CONSISTING OF AN ALKALI METAL OXIDE, LEAD OXIDE, AN ALKALI METAL HYDROXIDE, CALCIUM HYDROXIDE AND A QUATERNARY AMMONIUM COMPOUND HAVING A HYDROXYL GROUP.
Claim 2
Independent Claim
84 words
A METHOD FOR MAKING A CELLULAR POLYURETHANE WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A POLYALKYLENE ETHER POLYHYDRIC ALCOHOL WITH AN ORGANIC POLYISOCYANATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND CURING THE REACTON PRODUCT WITH A CATALYTIC AMOUNT OF A CATALYST WHICH CAUSES PORE FORMATION IN THE CURED PRODUCT, SAID CATALYST BEING SELECTED FROM THE CLASS CONSISTING OF AN ALKALI METAL OXIDE, LEAD OXIDE, AN ALKALI METAL HYDROXIDE, CALCIUM HYDROXIDE AND A QUATERNARY AMMONIUM COMPOUND HAVING A HYDROXYL GROUP.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |