US3355398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethanes prepared utilizing sodium borohydride as a blowing agent
Assignee: NCR Voyix Corp
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Filing: 1964-05-05
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Granted: 1967-11-28
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Kass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:18
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/065; C08J9/02; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS OF PREPARING A CELLULAR POLYUETHANE STRUCTURE OF UNIFORM SMALL CELL SIZE COMPRISING MIXING AND REACTING, (A) AN ORGANIC POLYOL HAVING A HYDROXYL FUNCTIONALITY OF TWO OR MORE PER MOLECULE EACH OF WHICH HYDROXYL GROUP IS AVAILABLE TO REACT WITH ANORGANIC POLYISOCYANATE. (B) AN ORGANIC POLYISOCYANTE, AND (C) UP TO ABOUT 10% OF SODIUM BOROHYDRIDE AS A BLOWING AGENT WHEREIN THE POLYOL REACTS WITH BOTH THE ORGANIC POLYISOCYANATE AND THE SODIUM BOROHYDRIDE, THEREBY GENERATING HYDROGEN GAS, IN SITU, TO EXPAND THE POLYURETHANE.
Claim 2
Dependent Claim
83 words
A PROCESS OF PREPARING A CELLULAR POLYUETHANE STRUCTURE OF UNIFORM SMALL CELL SIZE COMPRISING MIXING AND REACTING, (A) AN ORGANIC POLYOL HAVING A HYDROXYL FUNCTIONALITY OF TWO OR MORE PER MOLECULE EACH OF WHICH HYDROXYL GROUP IS AVAILABLE TO REACT WITH ANORGANIC POLYISOCYANATE. (B) AN ORGANIC POLYISOCYANTE, AND (C) UP TO ABOUT 10% OF SODIUM BOROHYDRIDE AS A BLOWING AGENT WHEREIN THE POLYOL REACTS WITH BOTH THE ORGANIC POLYISOCYANATE AND THE SODIUM BOROHYDRIDE, THEREBY GENERATING HYDROGEN GAS, IN SITU, TO EXPAND THE POLYURETHANE.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |