US2990380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing foamed resinous materials
Assignee: Nopco Chemical Co
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Filing: 1957-11-04
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Granted: 1961-06-27
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Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Bertram J Auerbach
- 👤 Harry J Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:04
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/365; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7414; Y; Y10; Y10S; Y10S261/00; Y10S261/26; Y10S264/00; Y10S264/13; Y10S366/00; Y10S366/604; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD FOR PRODUCING FOAMED PLASTIC MATERIAL COMPRISING MIXING TOGETHER AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTABLE HYDROGEN ATOMS AND CAPABLE OF REACTING WITH SAID POLYISOCYANATE WITH THE EVOLUTION OF CARBON DIOXIDE GAS FOR THE PRODUCTION OF SAID FOAMED PLASTIC MATERIAL AND PASSING THE RESULTING REACTING MASS ACCOMPANIED BY THE EVOLUTION OF CARBON DIOXIDE GAS INTO AND THROUGH A PRESSURE RESPONSIVE RESTRICTED ZONE WHEREIN REACTION ACCOMPANIED BY THE EVOLUTION OF CARBON DIOXIDE GAS CONTINUES TO OCCUR, SAID ZONE HAVING A PRESSURE RESPONSIVE MOVABLE MEMBER, WHICH MEMBER EXPAND AND CONTRACTS SAID ZONE IN RESPONSE TO PRESSURE VARIATIONS EXERTED THEREIN BY SUCCESSIVE PORTIONS OF SAID REACTING MASS PASSING THROUGH SAID ZONE THEREBY AIDING IN MAINTAINING SUBSTANTIALLY UNIFORM CELL SIZE IN THE ULTIMATE MATERIAL PRODUCED.
Claim 2
Independent Claim
127 words
THE METHOD FOR PRODUCING FOAMED PLASTIC MATERIAL COMPRISING MIXING TOGETHER AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTABLE HYDROGEN ATOMS AND CAPABLE OF REACTING WITH SAID POLYISOCYANATE WITH THE EVOLUTION OF CARBON DIOXIDE GAS FOR THE PRODUCTION OF SAID FOAMED PLASTIC MATERIAL AND PASSING THE RESULTING REACTING MASS ACCOMPANIED BY THE EVOLUTION OF CARBON DIOXIDE GAS INTO AND THROUGH A PRESSURE RESPONSIVE RESTRICTED ZONE WHEREIN REACTION ACCOMPANIED BY THE EVOLUTION OF CARBON DIOXIDE GAS CONTINUES TO OCCUR, SAID ZONE HAVING A PRESSURE RESPONSIVE MOVABLE MEMBER, WHICH MEMBER EXPAND AND CONTRACTS SAID ZONE IN RESPONSE TO PRESSURE VARIATIONS EXERTED THEREIN BY SUCCESSIVE PORTIONS OF SAID REACTING MASS PASSING THROUGH SAID ZONE THEREBY AIDING IN MAINTAINING SUBSTANTIALLY UNIFORM CELL SIZE IN THE ULTIMATE MATERIAL PRODUCED.
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |